you lose, go make more tinfoil hats
1) Building 7.
For everyone else:
2) Last time I checked, I exhaled quickly when throwing a strike to tighten my diaphragm and abdominal muscles in order to efficiently transfer energy from my hips through my torso and then into my shoulder and arm. Try this - keep your stomach completely relaxed (put your left hand there to make sure, if need be) then throw a right hook. It'll be like throwing a weight attached to a flimsy ass piece of rubber. Whoever said that exhaling is for defense is only coincidently right.
3) You see more one punch knockouts in MMA for a few reasons - Boxing gloves are bigger and offer better defense for the chin (which is where most flash KOs result)... Boxers generally trade punches from stable positions which makes it a lot easier to move with and take a punch, while MMA knockouts usually occur when people are dancing all the fuck over the ring, dropping their hands and/or running clean into the other guy's fists. And lastly, the sad truth is boxers are much much better at defending against punches than MMA fighters. It's a matter of training priority - in mma you have to work ground game, subs, takedowns, clinching, and striking (with kicks, elbows and knees). A boxer can afford to practice slipping and bobbing a whole hell of a lot more than Joe MMA.
4) MMA gloves cause more surface damage (knuckle in the eye, temple or top of the ear, anyone?) and deliver more force because of the smaller surface area. All gloves are not created equal so unless we're lining up every 4/8/10 oz glove in the world and comparing the padding, there's no point in arguing. But keep in mind... when you're hitting a hard object like the skull, padding matters a lot less because no matter the type, it will compact... it's just a matter of how much.
5) Handwraps add SUBSTANTIAL stiffness to the wrist and hardness to the fist in boxing. Last time I checked, only the bare minimum of the hand is allowed to be taped in the UFC, and no knuckles. When you wrap your knuckles, half of that wrap goes inside your fist, giving you something to squeeze, thereby negating the amount that your fist compacts when you punch. Try this - hold one hand out in front of you and punch it while watching your punching hand's wrist. Hit in multiple places, and watch your wrist/fingers bend upon impact. It doesn't matter how hard you're squeezing, chances are unless you land the punch directly on the large knuckles, your wrist will give a little. Do you know how many punches land in that sweet spot on the fist in a fight?
6) When it's all said and done, if you get hit full force on the jaw unprepared by someone with decently heavy hands, 4, 10, or even 16, it doesn't matter. You're probably going out... but I fully encourage everyone here to get hit in the face and head by all types of gloves if you haven't been already. You'll notice the difference. Lighter gloves feel more like a fist, heavier gloves feel more like you got off a nasty roller coaster. Apples and oranges.
So in conclusion, what makes the difference is the surface area of the larger padding. All things being equal, I would much rather get hit with a bare fist than a bare fist holding a 16 oz lead weight.