I guess you could say Sonic Boom is an indirect sequel

You don't have to agree with me. Here's my opinion on Mario vs Sonic series.

I love both series, but lets get real here. Mario has always had the more dumbed down/overly simplified gameplay and cheesy/cornball soundtracks until Galaxy came along. Since day 1 Sonic has had some of the best tunes of all time in gamings history. 

Therefore the responses don't surprise me here.

The gap between Sonic (Mega/Sega) CD (Also not mentioned in this thread) (1993) then Sonic & Knuckles (1994) and Sonic Adventure Sega Dreamcast (1998) was terrible for the franchise imho. 4-5 year gap was just to much for such a huge franchise for Sega.

Sonic 06's real world setting was just plain silly/dumb idea imho as well. It's a cartoon game and should always remain in that spirit.

Sonic Generations and Sonic Colors are amazing, and true to the originals imho.

IMHO ever since Galaxy 2 for the Wii, Mario games have been on the decline for me. I'm still waiting for SMG3 ;) Almost 4 years now Nintendo o,0. No wonder the Wii U is having problems like the Sega Dreamcast...no real Mascot game after 4-5 years (SMG3) can really hurt your system (Wii U). It's all in the history books people. Nintendo is doing a Sega imho, you don't have to agree with me people it is what it is.

I wa always a Sonic guy.......
Sonic The Hedgehog was and is still an amazing game. Brings back so many great Genesis memories.
Sonic 2, 3 were also awesome titles.
When Sega released news of Sonic 3 + Knuckles I almost lost it...... OMFG that cartridge connection was so full of awesomness...

Sonic Generations is the best sonic game ever since.

Sonic for the win.

You are insane.

I am choosing  Mario simply because there are too many medicore/bad Sonic games out there! Don't get me wrong, I do love Sonic games like the original Genesis trilogy and Sonic Generations, but I can't choose Sonic when games like Sonic 06 and Sonic & the Black Knight exist! I hope the Sonic fanbase won't kill me!

Yeah look at what league of popularity the Wii U is in currently with all the 2D Marios and Isometric 3D marios, the demand is through the roof! Instead of a true/real 3D like Mario 64/Galaxy did. 

You're so right. Fans know what is the best true 3D Mario, 2D versions are fun but they do not "GRAB" us Maio fans like teh true 3D ones have of the past. I don't even know why they call it Mario unless Miyamoto truely isn't the one designing them either. Oh yeah cash grabs are easy dolla dolla billz, and they get away with it all the time, but people are seeing behind the facade with the Wii U this time.

Mario might always be considered better than Sonic (It came first anyway), but Sonic has been coming on stronger imho. Sonic Colors, Sonic Generations, Sonic Racing All Stars Transformed, Sonic Lost World. Even Sonic Boom looks excellent. The Sonic series has been doing better than the Mario series as of late imho. Everything that has came out after SMG2 (2010) has been completely uninteresting to me, that's 4 years. From Sonic colors 2010 to now has been good games for the Sonic franchise. So for me it's Sonic until we get some solid true 3D Marios from Miyamoto, but he's obviously burnt out on it or needed a long break.

I have to give it to Mario, though I personally prefer Sonic.

Mario, I never really quite liked the level design in Sonic games.

Sonic Generations also sold on Steam/PC. Check out Sonic Hits Collection http://store.steampowered.com/sub/26498/. Nintendo doesn't do Mario packs so it's easier to tally their sales. Sega does bundles for your future reference. 29.99 gets you over 10 Sonic games for 29.99 how many Mario games can you get for that price? So comparing these 2 franchises with VGA chartz numbers is rather silly imho without real numbers from both franchsises. I'm also not saying Sonic wins in sales but that the totals are nowhere near correct.

Those Mario sales totals prove my point though that Mario 64 as you pointed out sold around 10 mil, and then another 10 on DS. Galaxy 1 and 2 close to 20 mil together. NDS 3D isometric should stay on NDS not the WIi U. 2D Mario games sell really well when you have a Wii sized install base and not a Wii U sized one so what gives? Platform is what gives, you can't put 3DS type Marios on Wii U and expect killer sales. 2D Marios and 3dS marios do not sell well on the Wii U, and it doesn't help people adopt the console. Mario 64/Mario Sunshine/Mario Galaxy games do. That's most of my point. I also agree with youy that 3rd party is a problem for the WIi U. Nintendo is still the one spearheading the problems imo, and the fact that they don't know what Mario the people on the Wii U is absolutely HILARIOUS for myself being a SOnic fan. It's like Nintendo intentionally wants bad sales this gen and they're doing everything in their power to do so.

Justin Beiber and Hannah Montana/Miley Cyrus sell craploads it doesn't mean they're the best artists out now does it? With your logic why yes , yes they are? If you do think that there's no point left for me to make. Except imagine if Nintendo did a digital Mario 10 game pack for 29.99 on the Wii U...imagine that BasilZero, imagine that. Nah they won't get with the times at Nintendo imho.

The worst mainline Mario games are around par with the best Sonic games.