Which of these games do you consider the harder of the two? DDR is certainly more aerobic, while Guitar Hero tends to have more complex combinations to hit.
I've tried both and personally I'd say Guitar Hero is much harder on the hardest level than DDR is. Of course I don't feel as stupid playing Guitar Hero as I do playing DDR... If I never played DDR again it wouldn't be too soon.

I've tried both and personally I'd say Guitar Hero is much harder on the hardest level than DDR is. Of course I don't feel as stupid playing Guitar Hero as I do playing DDR... If I never played DDR again it wouldn't be too soon.