So after researching the two, I would have to give this to Jon Talbain for three reasons.
1. Speed and Agility: Jon Talbain definitely outclasses Sabrewulf in that category, having bullet time speed reaction, seeing Sabrewulf, he's definitely faster than the average human, but compared to Jon Talbain, he's really slow and clumsy from the gameplay I've seen from him.
2. Long-Ranged Attacks: It seems Sabrewulf doesn't have any long-range attacks, so that's definitely a big disadvantage, Jon Talbain on the other hand does however and it involves around with magic, so that's a great advantage for Jon Talbain.
3. Better Fighting Style: Sabrewulf's fighting style wouldn't be able to do that well against Jon Talbain's, whose fighting style consists of Marital Arts, whereas Sabrewulf fights alot more feral and animalisticly.
Overall, Jon Talbain would be the winner of this fight. Don't get me wrong, it's a close fight, but like I said, those three factors I listed above gives the victory to Jon Talbain.