When creatine creatinizes itself into creatinine, it creates a creature which creams at the thought of creapure.
Seriously people, you can type half your questions in google and get PLENTY of results. And technically before anyone makes a 'this vs that" thread, they should research both compounds on their own and their effects/functions in the body. The you would be able to come up with an answer on your own.
Not to be a douche, so I'll still say something.
Creatine is good. Plain and simple. Here's a nice summary about it: http://en.wikipedia.org/wiki/Creatine#Health_effects
Glutamine depends. If you're taking it just to "build muscle" then don't waste your money. You get enough from food in regards to building muscle. However if you want to improve the health of your digestive system and/or improve your blood pH (Like from a high protein diet) then glutamine is good.
Case in point: Buy creatine, and take glutamine if you want to treat the things I mentioned above. Otherwise save your money.