Nemesis Vs Krauser

Nemesis has all his weapons.

Krauser has everything including his claw but unable to Insta-kill like in the game.

Krauser doesn't have an "Insta-Kill" attack. That claw slash you must be referring to is just so powerful.

Considering that Nemesis can't feel pain and has a rocket launcher plus his rather long killing-tentacle, I think he'll be able to smear Krauser into the ground.

He can transform into his more grotesque and more powerful form if he get's beaten enough from Krauser.