I'm well aware there's more to it than that, but bottom line, bigger and heavier bullets will always hold more downrange energy and oftentimes, just as much velocity as a lighter faster bullet, despite the slower muzzle velocity.
I've shot whitetail deer with everything from a 55gr .223 to a 220gr .300 Weatherby... Sometimes they run, sometimes they drop. Every animal is different, so every shot situation results will end differently. It's impossible to tell every shot whether they're gonna drop or run. That's why as hunters, we all try to stack our deck in our favor, to eliminate as much error as possible.
I've found deer seem to have a hard time walking away from a Berger 168 VLD leaving my 7mmRM at 3,115 FPS MV. I'm sure with a 175 Elite Hunter I wouldn't lose but maybe 50 FPS, but would gain more down range.
Listen to us or don't...Not my problem. You asked a question, we're giving you answers. That's what forums are for. Collaborating on issues to solve problems and help each other. If that's not what you're looking for, you might be better off getting advice from FakeBook, Twatter, or your local big box store, where everyone they hire off the street is an "expert".