I'd have Haye as a slight favourite but can see Pulev winning.
The way he wins is by making Haye work. Chisora tried a similar strategy but was too heavy and was slapping with his shots. Nothing was sharp.
A young unbeaten fighter like Pulev represents a stiffer challenge to Haye who was short on ideas vs Wvlad and was eventually worn down by Thompson. Aslong as Pulev keeps his hands up nice and tight and keeps a tempo where Haye is constantly reacting then I give Pulev a good chance. Haye likes room to work and does so at his own pace so Pulev would be playing into his hands if he stood infront of him like Ruiz
For Haye to win its all about speed, striking fast and getting out again, making Pulev follow him & being a moving target. Punch selection is key or it could be a hard night if he begins to gas and Pulev walks through his shots. If Haye cant dictate and gets drawn into a physical fight youd lean towards the bigger man.
Make it happen.