Originally posted by: SP33Demon
Too tough to call IMO. Maddux is the best finesse pitcher of all time, Pedro probably has the best stuff of all time for a power pitcher (circle change, slider, breaker, fastball). Note that Clemens is probably the best overall power pitcher of all time simply because of longevity, he makes Nolan Ryan pale in comparison when you talk old age and pitching excellence.
Career wise: probably Maddux because he has amazing longevity (much like Clemens) and was never prone to injury like Pedro, who had many seasons cut short because of his labrum. Maddux strung together some incredibly dominating seasons consistently and injury free. However, Pedro has posted the best season of all time in 2000 so that leads me to...
If both were in their prime, Pedro gets the edge because he could spot the ball as well as Maddux but with much more velocity and nastier stuff in his arsenal. Pedro also isn't scared to pitch inside, whereas Maddux wasn't known for that (although he could paint the inside corner with the cutter very effectively). My .02