Unfortunately there wasn't much; i.e., since both have multiple capabilities then each could have been switching abilities to use against each other. Didn't Sylar even have a freezing (breaking Hiro's sword) as well as melting (after killing Zane Taylor) abilities? Instead he just focused on telekinetic powers. Peter himself did nothing much... no flying, no going invisible, not even using telekinetic powers himself. Instead he just used the old-style "beat the crap out of" Sylar after seemingly absorbing the strength of Jessica.
When sword-wielding Hiro teleported into the scene he was pretty far from Sylar and yet Hiro was able to do his "deed" even with Sylar seeing his approach. However, earlier Sylar was able to stop Parkman's bullets ala Neo of The Matrix. Remember, he also has melting abilities which he could've used with both incidences. I guess Sylar is more just a collector than a user of talents. Or maybe he just wanted to kill all competition? 8)
Hmmm... although when you think about it, Peter versus Sylar is not an even match with Peter having added abilities like flying, regeneration, and Jessica's strength... on top(?) of Sylar's abilities. The only thing is Sylar seem to have more confidence than Peter using his acquired abilities.
As to those complaining why Peter didn't do this and that like flying himself to explode somewhere... well... you folks might have missed what Peter told Nathan... "I cannot do anything..." ;i.e., he was like a Windows operating system that hang and cannot do anything else but go nuclear and explode (like Windows blue screen of death?) ;)