The R6 Vegas games are amongst the hugest, most steaming piles of poo ever to grace Pcs. Ever.
Do not buy them, heck, don't even play them if you get them for free. Both are abysmal in multiplayer and single player.
Their only redeeming quality is that they are marginally better than R6: Letd.... Lockdown.
Of course, that's my opinion as an old School R6 fan since part 1 (Ranbow Six, NOT R6V).
Seen with less bitterness, they are still only an average shooters. Gears of War with "real" weapons is the most accurate description of it.
As alternatives, on PC you could get:
- Any Call of Duty, which, despite me hating that series too, are still way better than R6V
- Gears of War: allright, PC only got part 1, but that's the "original" if you're´after that kind of gameplay.
- Ghost Recon: Advanced Warfare. A lot better than R6V, but still not as good as the original Ghost Recon or R6 games.
- Kane and Lynch. Also GoW gameplay with "real" weapons. And part 1 has a good story IMHO. Haven't played part 2 though.
Or, which would be the best alternative: go get the Original R6 games. Part 2, Rogue Spear is the best, but part 3, Ravenshield, is still pretty awesome.
On a sidenote: notice how all good R6 games have RS as initals? Rainbow Six, Rogue Spear, RavenShield...