I think comparatively speaking Wladimir fights more "by the book" than Lennox Lewis did. Maybe that's why Lewis was considered more fun to watch by most people.

I will say it's a testament to how great Lewis was to be able to recover so quickly and even win on an "off night" like he had vs Bruno. Being able to work through that kind of adversity makes fighters great. For example Marciano and "The Punch" vs Walcott came at a point when Rocky was almost stopped the previous round. That moment alone added a lot to Marciano's legacy.