I'm not generally a fan of Dana White because I hate, detest, and loath MMA. However, this interview made me kind of like the guy a bit. I like that he was giving Vince McMahon and the WWE their credit, and kind of showed that while UFC is huge, he knows his place.
Vince is another story. I love Vince, the character and the guy, I think he's the shit and you can write that down for the record. I like the way he goes at anyone who even seems to be taking a shot at him. I also think that in this case it would more likely be Spike TV taking a shot at him, rather than Dana White and the UFC. They just happen to be the company caught in the fray.
As for whether or not UFC actually IS competition to the WWE, I'd have to say of course it is. It is another form of entertainment on Monday night, in the same time slot as his Monday Night Raw. MMA has regrettably been a growing phenomenon for some time now, and while I believe it's just a fad for insecure guys, it appears to be around to stay. That being said, UFC has a large enough fan base to make a noticeable impact on Monday nights.
I don't think that the UFC would want to make a formal war out of it in the fashion TNA has though. As Dana White himself said, Vince is a fucking animal. He won't take it lightly, and there is no telling how far McMahon would go to make his point clear. I don't think having Mike Tyson on Monday Night Raw is any sign of him doing just that. I am pretty sure all it actually amounts to is a coincidence in booking, unless it was a move by the network.