As Maley already said, it's a very common meat product in Europe.
I don't eat it though, because I believe horses are elegant and beautiful creatures. But most people do eat ***** meat and really like it. I principally never did, so I can't judge about the taste.
The difference in between cows and horses are obvious, cows are reproduced to slaughter (at least in Europe they are), and ***** meat is only used when the ***** it old, and when they can't use it anymore for hard labour, or to ride it.