keeping in mind that protogens are very hard to kill and the strongest (the rare type) can manipulate their visor, the protogen would probably win and only have minor damage to their visor. (and to note: I said probably)
so jetstream sam has a few distinct qualities that i'd like to point out
1: he can parry 20mm machine gun bullets with relative ease [and get close enough to slice through an armored car]
2: he CAN slice through nanomachines [as seen in the fight with Armstrong in the Jetstream DLC]
3: his sword apparently channels lightning, which is not good for beings that have electrical components or can conduct electricity [for instance, 1 hit = fried protogen]
With these things to look at and other various combat advantages Sam might have, i'd say they're evenly matched, but the thing about furry fighters for me is that they usually have a larger profile and their tail can sometimes prove to be their downfall
to sum it up, it'd be an interesting fight, but i'd place my money on the brazilian [my opinion].
oh yeah more on the whole lightning thing the murasama sam wields is "a sword reinforced by a powerful alternating current" [so if you or anything you're holding gets hit with it, prepare for a SHOCKING surprise] "and resonating at extremely high vibration frequencies." This oscillation weakened the molecular bonds of anything it cuts, thereby increasing its cutting ability. Striking, cutting, and thrusting attacks were performed with the blade, with the sharpened edge and point used for lethal attacks, and the blunt edge used as a clubbing weapon. Proficient users were also able to wield the blade with such accuracy and speed that they were able to deflect bullets, such as Raiden, [or in this case, sam].
But close enough, uncommon protogens can have wings but cannot fly, and both wings and horns are optional, Rares only have one set of wings if they have wings, and if they dont have wings, they can levitate. Its close though
oh and also rare type protogens were almost unstoppable, they were used by our creators for a 'SWAT' team of such. And by manipulating their visor i mean manipulating their nanites which make up their visor to turn into shields and such. Rare protogens are mostly mechanical (they are more than half mechanical) and so they would have more strength than a male human. There is a ton more that would back up my reasoning, i dont want it to get too complicated though, but the protogen would almost definitely win.
1. All art needs to be credited, so who made the art?
2. I'd say the protogen, if they're meant for fighting which appears to be so then chances are when they were created they were genetically modified to be stronger and such. And humans only develop skills, no one is really born with/has time to become the greatest at something