I must say no to this, it's like comparing cats and dogs, one who doesn't understand says that they are both animals and are therefore the same thing when they clarely have different behaviour, intrests and apperance. They might work the same way, eating, playing, sleeping and "visiting the bathroom". What I'm saying is that you can find similarities in everything, even opposites, even if it's stupid, it's still a similarity.
What bronies differs from furries:
1. Kids friendly forums
2. Fandom based on one show
3. Non anthropromorphic avatars, art and so on. Only ponies, personallised ponies. Sure there are exceptions, aways will be. Furries have ferals, but you get my point.
4. Provide donations and raise money for the show we love.
In my opinion bronies aren't furries.
EDIT: Furries are part human, part animal, we are just ponies.