Which Predator??

In your case both are non hemi. One is carb compliant. One isn't.

The carb compliant One is lean from the factory and should have an extra vent for the fuel tank.

Both are the same engine internally. Carbs, pipes, intakes, ect all swap the same.
Thank you!

Only model can get online at the moment at Harbor Freight.... Is the carby itself exactly the same between the non hemi models with just restrictor difference for carb compliant?