Hehe I see That's up to you I think, maybe it's fun if you have to guess if it's one or the other. Now that I look again, I can see they have almost the same hairstyles. I thought the one with blonde hair was a girl, maybe it's the big bright eyes, or the bare stomach xD
Wow another amazing drawing, I know I've already said this but gosh I really really admire your work ethic. I adore the facial expression on the character with the brown hair and the way you drew the characters ears looks so good to. The poses are great and I love how they are interacting with each other. Fantastic work Inma.