Ugh, enough with review scores. It really means nothing, you'd have to agree on GTAIV and SMG being superior to both.
I prefer the Gears franchise in most of the key aspects - the graphics (cartoony art style over realism), the gameplay (focus on shooting, 2 player co-op / split screen), music / mood (example). The story on both is okay, though not something I care about in games like this. The characters are probably about even as well (Marcus' character design is just awesome).
Drake is funny, though I prefer when the lead character I'm playing as is a badass. The only ones in Uncharted are Tenzin (he owns), and maybe the main villain.
Overall, I'd say Uncharted gives a better single player experience (campaign), while Gears delivers better on everything else (2p campaign, multiplayer). I tend to enjoy the latter more, so my pick is Gears.
