If you are not responding from creatine monohydrate than I would be doubtful you will get positive benefits from other versions of creatine.
Saying that, it would be worth a shot and I'd be interested to hear any results you had, Shrek.
As someone pointed out, most people who claim to get benefits from pre mixed creatines are getting results from an insulin spike caused by large amounts of sugars rather than anything else.
Creatine Monohydrate, despite what the big brands say is still the most researched and supported supplement. It's advantages do seem to be more than just for strength though, as even endurance athletes benefit from it.
My theory here is that all forms of exercise use all of the bodies energy systems to an extent, so even in aerobic activity, the benefits of increased creatine levels should be noticed.
I completely agree with whoever suggested that some people are responders and others aren't. Generally the less meat and protein you have in your diet, the more you would benefit from creatine.
I'd love to see a study which looks at vegetarians too as these are the people who 'should' benefit most.
One ingredient worth a look which we stock is Creatinol Phosphate. It is somewhat different to creatine in structure and if any form of creatine should be beneficial over other versions by resisting conversion to it's waste product creatinine, then this would be it.
CREATINOL PHOSPHATE (COP) - 250G
We use this in Creaflex ATP which I formulate for Bioflex. Creaflex ATP contains creatine mono, creatine tri malate, creatinol phosphate as well as the actual molecule atp.
People who take it are getting great results, however I haven't heard any feedback from people rating it directly against creatine mono (which should always be the reference point).
http://www.bioflexnutrition.com.au/atp.cfm