Shirtless Zac Efron vs. Shirtless Dylan Efron - Who's Hotter? (PHOTO)

Zac Efron shared a shirtless photo of him and his brother Dylan and I have to say: Dylan is giving Zac a run for his money!

Very cute brotherly love.

#brothers

A photo posted by Zac Efron (@zacefron) on Jul 6, 2015 at 7:51pm PDT