Hi,
Does PSpice allow users to modify the parameters of almost all devices (e.g. Coss, VGSth, etc.)? Tina does, you can choose the level of transistor model and so on, so I guess PSpice will have those things too.
I would have thought that a well-modified model might be more realistic/accurate, however, as all is reducible, it should be possible to create a plausible reduction that represents the transistor. I guess that is hard to do unless you really have a deep level of understanding of both equivalent models and what the datasheet is willing to share with you, though.