This thread have been done a hundred times over the last decade on various forums. The result has been and will always be the same. Around 60-70% of the votes will go to Lewis. Maybe 60% for this thread due to Wlad just having delivered a brutal KO.
He also have the body combinations and the upper cut. That shot Pulev almost hit Wlad with would have been a KO from Lewis. Of course this version of Wlad is actually past prime and not at his best. I would use the 2009-2012 versions of Wlad against Prime Lewis.
Klitschko can move laterally much better than Lennox Lewis could and cut off the ring using a left hook. If Klitschko forced Lewis to cut off the ring with his left hook, Lewis loses.
Wlad would go down in a heap. Simply Wlad cant take a shot, even shots that barely were reaching him from Pulev had Wlad doing a dance.