Alright, let’s see
Power Armour Batman upscales to 171.27 Gigatons of TNT. Spider-Man upscales 207.085 Gigatons of TNT. So Spidey has the AP advantage, plus there’s the Damage Bonus that the TASM2 Suit gives him. Meanwhile, Batman has an LS advantage
In this end, I’m in favour of Spider-Man winning here. His Spider-Sense and Time Manipulation will allow him to act much faster than Batman, and knowing how Peter uses his his Spider-Sense and Web Rush, this is crucial.
His ionic webbing would also pretty easily eat away at the armour, leaving Batman very vulnerable as a result. Using smoke bombs won’t do anything, as Peter’s senses can easily see through those and he was left unaffected after having one of Black Cat’s smoke bombs tossed in his face. Seismic Blasts and Pressure Points would also leave Batman wide open as well. Additionally, knowing the kinds of opponents Spider-Man can take on casually (such as ex-military mercenary gangs, the Task Force, the S-01, and Smythe’s Hunters), as well as the greater threats he’s proven himself to be superior to (such as Kraven and Kingpin), Peter certainly has the capability to use his advantages to their fullest
Voting Spider-Man