not a teacher
You don't need to repeat "in that profile picture".
I would be inclined to give "Wow!" an exclamation mark, although your form is common and, in my opinion, not incorrect.
I think that "style" is fine, but maybe "look" is a very natural alternative here.
I was tempted to hyphenate "hip-hop", but it seems to be written both ways in all sorts of contexts.
"Wow! I didn't even recognize you in that profile picture because you have a different look. It's more hip hop than usual."