Well. I feel like having shadow on a fire would be a bit weird. I also tried to limit colors and now there is about four more of them. Another thing is that he is intended to look cute and maybe like he is surprised or maybe about to start talking. I didn't actually think too much about it. Yours looks very different stylistically. Maybe there is too much or too little detail somewhere but I wouldn't like to add another bunch of colors. But now I also feel like there is a bit too much at the top or too little at the bottom.
I see one of the things i did wrong is the mouth. Fire in the mouth looks like teeth. It wasn't intended to look like teeth.
Here, I replaced the mouth:
I'll try to so something about inconsistency in detail and other stuff later.
Thanks for the feedback.
EDIT:
I've edited eyes and mouth a bit. Not sure if it looks better. Like if the mouth is distinctive enough. And I wouldn't like to give him lipstick.
Oh, yeah. When I was making the first picture I used this as a reference:
I added swirly flames, because I though they would make it more obvious that he is a living fire-thing but they may be making top a bit busy (too many swirls?). Also, I just wanted to try making flames. Originally the background was more red but I though the colors were too similar so I made it bluer for contrast.