Played both series extensively (not really familiar with the lore beyond the games) and I can't even imagine a scenario where anyone could come to a conclusion other than Samus.
She's faster, more mobile, likely stronger, has way better shield tech, and has virtually unlimited, more powerful ammo built into her suit.
A charged plasma pistol shot is enough to completely deplete the Chief's shield, replace that with a charged power beam shot, then what? Or insta-kill via plasma grenade, replace with power bomb..... Even the most powerful beings in the galaxy take minutes to wear down Samus' shield at full power, what could the Chief do, he'd be dead before he could change weapons.
I'm just not seeing it.







