I'm a Game Maker user, and I'll have to agree with TGWDNGHN.
While I'll admit that most games made with gm suck, there are quite a few that stand out from the rest. http://www.r1ck14.cjb.net is my gm games site. check out the games i've made on the games page, the lower down the game is on the page, the newer/better it is. My "chain reaction" puzzle game got a 9/10 on gamehippo.com
I think if you really wanna compare gm made games with professional games, you should check out my Metroid demo located at http://www.geocities.com/webmaster2x/metroid.html
That demo is 2 weeks in the making.
DB was designed mostly for 3d, and gm was designed for 2d, so you can't really compare them on an even playing field
Note* I'm not here to spam about my games or site, I'm just giving an example of what gm can do.