Garcia, because Bradley has no chance of upsetting Floyd at all. Both will get UTFD'd by Floyd but with Garcia there's always that tiny little chance.
I think it's the opposite. Both would obviously be serious underdogs but I think if anyone has a legit chance, it's Tim, not Garcia. And it's because of speed. Tim actually has great foot speed and that has troubled Floyd in the past (Hatton early on and Ortiz in stretches). He's also got hand speed and reflexes on par with Floyd. Garcia simply doesn't have that level of natural talent to trouble Floyd. Not taking anything away from Garcia as he's a solid boxer who does everything well but my point still stands. Also, Tim has a heck of a jab and that has troubled Floyd in the past. So we have a guy with foot speed, hand speed, great jab, Holyfield type mentality and A level boxing skills and I say Tim poses the greater threat.
Id rather see Bradley vs Garcia first, and then see May fight the winner. If I had to choose, idk.... I cant. As worthy as these challengers are, and they would be his most rightful challengers in a looooong time, the fights are simply not that compelling to me as I give either one almost no chance to win. Garcias slight chance comes from his power and timing. Really though, its still almost zero. And Bradleys chance comes from his good boxing skills and his jab.
I'd rather watch Mayweather vs. Bradley at this point due to Bradley being the more established fighter with the better resume than Garcia. It's a shame the fight won't happen.
Bradley is not only more established at welter but he is also a greater fighter period than Garcia, Bradley is also in the absolute prime of his career he shows us the ability to adapt adjust and overcome adversity and has a very versatile style and trains hard and just knows how to win Probably wouldnt beat Floyd, but who does. At least Bradley has been in with some big names and held his own I'd say he is worthy but probably not ready
Bradley would make it more competitive, but it would be more entertaining to Watch Floyd dissect Garcia
