Which is better? :)

Unless there is a reason why you might not want the third clamp, I can't think of a good reason not to get the Y-style with clit clamp.

Even if you decide you don't like the clit clamp for your clit, it can be used for other purposes. It can be difficult to get clamp at the right pressure for it to stay on the clit yet not be painful - but then I guess that's kinda the point too . Otherwise, it can clamp on to various other parts of the upper body or be used as a leash, so it's hardly useless if it doesn't work for you as designed.

IMO, hands down I would stay away from a tweezers type clamp. A clamp on my clit is difficult to stay in place even with an adjustable thumb screw, on my nipples, the thumb screw holds most of the time.
I like the option of being able to disconnect the clit clamp and just use the nipple clamps.

I think the bullnose clamps hold better, but then I have big nipples and enjoy pain. The tweezer style didn't seem to hold up to the tugging I like to do or the wearing under clothes. That's just me though.