For a second, I thought you were talking about
Jaws Jaws. But cuz you're not, this is a REALLY close match. I had to analyze everything here.
AP
I believe Jaws has better AP advantage. Jaws can one-shot a bull shark by biting it. Bull sharks can take bites from other sharks. And the Great White Shark has a bite force of 3.1217495e-5 tons of TNT.
Lifting Strength
Lifting Strength, you kinda don't know in this category. If Jaws is Superhuman, Stan wins in that, if Jaws is Class 5, he wins in that. But because it says possibly Class 5 instead of likely Class 5, gonna give it to Stan.
Dura
Dura probably goes to Stan here as while Jaws just took a drop, Stan is more durable than Dipper. This...is dipper's dura justification: (Took a massive beating from Rumble McSkirmish. Could survive putting his hand in the "Pain Hole" which made even the Manotaurs cry in pain, which are tough enough to destroy solid rock and collapse trees through sheer movement. Was merely annoyed by a wolf gnawing on his leg. Survived being tackled through a window by Gideon Gleeful. Withstood a small explosion and bashing through a wall while holding onto a ship that was moving at superhuman speeds).
Stamina
Superhuman vs Above Average. Jaws wins here.
Intelligence
Average vs Above Average. Stan wins here.
Conclusion
THIS IS ONE OF THE CLOSEST MATCHES I HAVE EVER SEEN! Although Jaws sweeps in AP and Stamina, I think Stan's lifting strength, durability, and intelligence will give him the win here.