I don't have those non-chasers, but I have all the Chasers, and they match mine perfectly (which were pulled at the event).
In fact, I actually sat down just now for a while and compared my real pins to the high-res pics of fakes on eBay, and (so long as those pictures are accurate, and my pins are not errors), I discovered the following tell-tale signs:
Spades Chaser - Some of the counterfeits appear to use only a single shade of brown across the board, while the real version of this pin uses two shades: one shade of brown for the background, and another, lighter brown for the paint brushes. The counterfeit's brushes appear to be the same shade of brown as the background.
Tweedle Chaser - This one's easy: on the counterfeit, the hat on both characters is pure red. On the real version, the point on the very top of the hat is white.
Walrus / Oysters Chaser - This one's annoying, because it actually has both proper shades of brown. Luckily there's an easy solution: on the real pin, both the Walrus and the Oysters have black enamel filling their mouths. On the counterfeit, this black fill is missing, so their mouths are pink. In addition, the oysters' faces should be a sort of dark cream color, while their bodies are pink. On the counterfeits, their bodies and faces are both a uniform pink.
Dormouse / March Hare Chaser - This one does a good job of using both shades of brown where they should be. However, it skimps by not using pink at all. The Dormouse's arm, hair, left hand, and the rims of his ears should all be a vibrant pink: a different color from the rest of him. The little spot inside the teapot under his right arm should also be pink. On the counterfeit, all these areas that should be pink match the rest of his face, and the March Hare's face. There's no definition in the spots that should be pink: it's all just one color.
Queen and King of Hearts Chaser - The Queen's V-shaped eyebrow should be filled black. On the counterfeit, the brow is just flesh colored. Same goes for the King's mustache and eyebrows. Both character's pupils should also be filled black, but on the counterfeit, they're just filled white to match the rest of the eye.
Mad Hatter Chaser - This one's a joke. There's so much wrong with the fake version. On the counterfeit, there's a bizarre "X" on one of the two Hatter's chin for no reason. Both Hatters' eyebrows should be filled black, but both are just flesh-toned on the fake. The upper handle of the teacup should be a sliver of white, but on the counterfeit, it's filled black. The hand holding the teapot on the real pin has a clearly-defined thumb and thumbnail, while the hand on the lower Hatter, holding the teacup, should have five fingers. Instead, the counterfeit has no fingers, just kind of a fleshy ball.
The REAL pin actually seems to have a coloration error: the Hatter on the top of the pin (the one holding the teapot) is kind of throwin' up the horns with his free hand. The finger on the left of his hand (that's "house left", our left as the viewer, his longest finger pointing upwards) has a spot of white just to the left of it on the real pin, between the finger and the bow tie. This is filled red on the counterfeit, which actually looks correct, as it matches the rest of the background. Then the fake pin has a similar spot of white - a tiny line running parallel to the arm on which the hand throwing up the horns is attached.On the real pin, this is filled red.
Caterpillar Chaser - This counterfeit actually looks pretty good. The only difference I could find was tiny, but easily spotted once you know it's there: on the counterfeit, the caterpillar's tongue is the same shade of pink as his nose and hands. On the real version, the tongue isn't pink, and matches the rest of the caterpillar's face.
White Rabbit Chaser - The pupils and eyebrows of both Rabbits should be filled, but on the counterfeit they aren't. Instead, the Rabbit's pupils match the pink of his eyes, and his eyebrows are white like the rest of his face.
Cheshire Cat Chaser - This one looks great at first, but there are little signs that give it away (thankfully, since I still own a bunch). The Cheshire Cat's ears should be brown on the rims / outside, and flesh-toned on the inside. On the counterfeit, both the rims and the inside are flesh-toned. On the real pin, the upper region of the Cheshire Cat's face should be a sort of orangey brown, while his nose is a darker brown. On the counterfeit, they're both darker brown.
Alice Chaser - Where to begin? This counterfeit's a mess!
Alice's hair should be blonde: on the fake, the lower (larger) Alice has peach colored hair, while the smaller Alice has unnatural bubblegum pink hair. The same bubblegum pink is found on the background of the two paintings (the one of the flowers on the left, and the square framed one on the right). Those two paintings is where the peach color SHOULD have been, and where it is on the real pin. In addition, the real pin has a red partial fill in Alice's eyes, whereas the fake's eyes are just white. Big Alice's mouth should have a partial red fill on the real one, but the counterfeit has a solid red fill. The faces of both Alices should be the same color, but on the counterfeit the Big Alice is a weird brown instead.
Bonus Round: Cheshire Cat Non-Chaser: Funny enough, the counterfeit here is actually made better than the real one. On the counterfeit, both of the Cheshire Cat's eyelids are brown, matching the rest of the fur on his upper face (this is also true for the real Chaser). On the REAL PIN, only the right (house right, the view's right) eyelid is filled brown. It's yellow on the real pin, matching the Cheshire Cat's eye and making him look - frankly - like he's drunk off his striped behind. I WONDERED why this pin looked so weird when I pulled it.
I guess that's why.
I don't own any of the other non-Chasers anymore, but maybe Brenna or Austin can fill in the gaps, while verifying that my Drunk Non-Cheshire Chaser Cat is the standard, and not a deviation. Once I verify that this info is true, I'll refine this stuff and post it over in the Guide section.
-Jason