The only thing is that you know what eacho colour would have been in the first place, ie the green carpet the red...outfit and the yellow flower...
Add colour to a different image that I find and you'd be godlike

eg:
http://www.nicisoft.com/black-and-white-photos.htm
Thats if you actually did do it
As for your lying comment...I couldn't help but laughing pretty hard. What do you mean you can't understand why people would lie on teh internets? Its because they can. A lot of wierd people do it, most of it however seems to go on in chat rooms (Alleged Pedo mb? Not me though, all Excal)
Ha! I forgot to actually talk about whats on offer...I notice that in photoshop they are both different when you desaturate the colour one, so I can assume that you didn't just desaturate and lie (Or did you)...but regardless. Good job I think.