Bas Rutten demonstrates which one hits harder!
Bas Rutten busting myths on the differences between boxing gloves, and mma gloves.
I am not an expert at all but it seems to me that boxing gloves give you more weight behind your punches but slow them down and are softer/greater surface area so less likely to make cuts or inflict organ damage. Boxers often note the higher frequency of knockouts in MMA and say this is due to weak chins, perhaps the gloves explain it better. Other advantages of boxing gloves is that they are physically larger so allows easier blocking and protect hands from breakage.