Yeah, they both are ponyfied Edwards from Fullmetal Alchemist manga. The red one on the right is my design(), and the brown one on the left is ‘s design.
 
FMAyang created a crossover-fiction, where Ed and Roy Mustang are SENT to the world of ponies, getting transformed into them (that’s why Ed’s wing is artificial?).  
And my crossover is all about FMA characters that ARE ponies and always lived somewhere in Equestria.
 
When I was talking with FMAyang ‘bout our crossovers, I came to the idea that MY characters can meet HER characters…
 
And this is what happens when Ed meets Ed!  
…Sorry for long description!
 
Like always, don’t comment if you don’t like and please, no FMA spoilers.
 
–––––––  
Brown Ed belongs to  
Red Ed belongs to <–that’s me.  
Fullmetal Alchemist belongs to Hiromu Arakawa  
MLP: FiM belongs to Hasbro/Lauren Faust