Hi.
HSPICE is better because it simulates faster.
And psice is better, because it's free for simple schemes (complex schemes, including a lot of elements will not be simulated with pspice because of elements limit in free edition).
It depends.
For chip level circuit design, hspice is better as it supports more models and is more accurate.
For PCB level circuit design, pspice is better as it has more discrete component models from varous vendors.