okay seriously stop the spamming, this is getting ridicilous

More than likely, Mario Kart Wii will sell better than Gran Turismo 5. It's really going to come down to userbase, cause they are both frontrunner titles, but Wii will have a larger userbase to put it ahead.

As much as a fanboy as I am, I gotta say I think GT will do better. It will be THE definitive racing sim for many many years to come. I hate racing sims, I think they're boring as hell, and even I recognize what an incredible thing GT5 is shaping up to be. I think it's going to be one of the few actual system sellers for PS3. People seem to think every decent game is a system seller. I don't see MGS4 being an actual system seller, a great game that will sell incredibly well but I don't think it's going to make people run out and buy a PS3. GT5 on the other hand I could see actually persuading people to go out and get one. I think GT5 is to GT4 kind of what brawl is to Melee. A HUUUUUGE leap up in every kind of service that the series offers.

Mario Kart is going to do close to ten million, possibly even more than that.

Gran Turismo used to do 10M+, but that was on the PS2, which was a whole different beast to the PS3.

I continue to believe GT, GTA, and a few other franchises did extremely well on the previous Playstations due to the hordes of casuals that loved them to bits, and that the sales of both will take an extremely deep dive on the "casual-hater". This theory has yet to be tested, but if I'm right GT5 will be lucky to hit 4 million.

Of course I could be wrong, and the two games might end up neck-to-neck. I think the sales of GTA4 will be a good indicator of things to come.

Wellllllll, 31.4% of cube owners owned Double Dash

Andddd, 7.6% of PS2 owners owner GT4.

So my guess is MK Wiii all the way baby!!!

(Yeah, I know that many of the PS2's released were people buying replacements, and I know that Wii has alot of casuals, so my predictions could be way off, but according to my synopsis...

MK wii will sell way over 15 mil. (My calculation skills said over 30 mil, so this is a guess!)
GT 5 will sell about 7 mil. (Pure Calculating)

I feel smart...Yet stupid.

mkwii will do at least 50% more sales than GT5 lifetime...but prolly closer to 100%+ more

wii will outsell ps3 4:1 and mkwii will appeal to the casuals and the hardcore...i can easily see 15mil+ sales for mkwii tho i'll predict no less than 10mil

Even ignoring the redundant PS2 purchases, don't expect those numbers to hold. GT sales have been remarkably consistent from PS1 to PS2, so it's core user base will very likely stick with it (unless there's some other game out there waiting to take the title). That's why I can't see it selling less than 8 million.

Similarly, a good bulk of GCN sales went to Nintendo loyalists (like me). The expansion of Wii sales is moving beyond that base, and that likely means those "new" Wii owners (ones who didn't own a GCN) will purchase MK in lower ratios. It will undoubtedly do better than MKDD (about 3.5 million), but it would need to triple MKDD's sales in order to beat typical GT numbers. Not saying that's impossible, but it's hard to put money on that bet.

^actually, MKDD sold 6.6 million WW. Second, u still arn't accounting for the massive install base of the PS2 last gen which is not the story with the PS3 currently. Because Wii's install base is widening quickly, MK will win in the end

Damn your GT numbers are way too low so your opinion is now meaningless.

With the larger installed base, expect Mario Kart Wii to sell more copies than Grand Turismo 5. Considering how much less I bet MK is to develop, also expect Nintendo to make a heck of a lot more money off the game. (Then again, Sony is selling the GT demo for $40...)