Great artwork! Chun-Lis my fave! I like the colors you used, They create a high gloss effect thats really cool, Letraset i've seen before and they give great results, So do Copic but they're damn expensive!
No problemo! Yeah Copics great but its expensive because the pros in Advertising, Graphic Arts, Animation etc. use them! Hell i use a Artstore brand of markers called Artist's Loft and get great if not better results than the fancy crap!
The letraset promarkers are very easy to use, you'll get a "clean" result using them. There's a hundred different colors and if you need to shade an area you can just use the same color twice or thrice.
Sorry for my bad english but if need more info, you can check their website: [link]
I also heard that the Copic markers are very good too.
Because Blair looks like more spreading her legs and don't look so natural as the Chun Li. Chun Li's stance looks more natural to me, as she's ready to kick someone. Even the angle of her pussy seems to me more interesting, not a front view.
And finally, Chun Li's face looks more accurated, well worked. Her eyes and general expression.
Blair is a good drawing, real good. But I think you had done a better work with Chun Li. Well, it's my opinion.