I would have to go with Tauros. For in-game use, it's generally better to use all-out-attackers; Tauros has significantly better attack and marginally better speed than Furfrou. To Furfrou's credit, though, it does have a better SpD and an amazing ability that effectively doubles its physical defense, but Tauros' attack is going to be more useful than Furfrou's defense.
With that all that being said, if you just want a normal type Pokémon for your Y team, use Mega Kangaskhan. It drastically outclasses both.