I know that they'll handle all the power a naturally aspirated car can give them, but are they significantly different than the TII halfshafts?

Thanks.

 

T2 halfshafts are stronger, but N/A halfshafts are not as weak as people make them out to be.

 

looking at the two next to each other, the TII ones are just a little bit thicker. I think out of all the things in the driveline that would break, the halfshafts would be the last ones.
N/A drivetrains don't have a very good reputation in general, but if you don't do anything stupid it probably won't break on you.