The Hspice is better than Pspice for IC design. I think that you must choice the software by your demand. Even though, choice a best tool for your simulation.
It's said hspice level 49 model. So you have to use hspice.
but it might be compatable with spice 3f5 level 8 model. You can have a try with spice 3f5. Change it to level=8.
PSPICE only supports up to level=6.