But that's an alternate future / timeline which may or may not come to pass. The current Iron Man got his huge boost from the Extremis enhancement, which is what puts him ahead of Iron Man 2020 from feats that have been shown.
Gender: Male Location: Planning to take over the WORLD!
meh, in a quick look back, stark mentions something about some garbled systems when he first travels back, then takes out blizzard without effort and doesn't seem to have any other trouble with the armor when he later chases spidey. hard to say his systems were still f'd at the time of their fight, though he DID mention the armor was basically too powerful and handicapped him against spidey (similar to the trouble firelord mentioned . . .) -- im basically only HAD lethal force, and he didn't want to kill spidey.
nonetheless, all that doesn't really change the fact that when spidey got po'd he pretty much shattered parts of the 2020 armor and put a beating on arno h2h that the armor seemed unable to compensate for immediately. spidey kept the beating up and never allowed the armor time to self-repair . . .
i doubt highly spidey could do the same to the extremis armor . . .