[darvon]

All the above.

PLUS

A big diff is that PV requires the .NET Framework from Microsoft, an GT+ does not.

If you have had experience with .NET that might sway your decision.

I, and several others, have had very bad experience with .NET on other programs, with the .NET Framework bogging down the system to ridiculous levels. Others do not seem to have this problem, I cannot tell you why the difference.