To be fair, the Phazon plague was pretty much just as you described the Zerg; it's just that instead of being too big for one race or faction to handle alone, it had already dominated one of the races (the Urtragians, i.e., the Prime-specific Space Pirate race), and the source of its corruption was located beyond what any surviving known race could reach. 'Course, ol' Sam cleaned that one up just fine, once she jacked one of the Pirates' Leviathan warships; yay, wormholes! But yeah, that's another thing I love about her: if sheer power won't get the job done, she's also very resourceful and clever.
Also, I find the 2nd pic far more fap-worthy, for 4 reasons:
1: Samus is the one in control, which lines up with her strong, independent personality. A bounty huntress like her doesn't just take it up the arse for anyone, and a Space Pirate would be lucky to even get a peek on her in the shower.
2: The obvious lack of the Zebesian from pic 1. Seriously, those things are fugly as a cardinal sin, and any that tried to rape Samus would just end up getting leg-grappled to the ground and castrated. The Pirates seem more interested in her armor anyhow, at least if the Prime trilogy's scan logs are anything to go by.
3: Can't really figure out why, but Krystal's jumpsuit and Samus's Zero Suit just..."fit" with each other. Both serve very well in accentuating their wearers' features, while at the same time not exposing
too much...and no, I'm not counting those Zero Suit fetish pics, where you can see the friggin' rim of her nipples through the thing. XD
4: It's obviously just drawn a lot better.