I have a PS4 pro and it's definitely not worth the upgrade if you already have one. I'd almost say it's not worth spending the extra to get at all since the improvements seem pretty minimal and it doesn't have a 4K bluray player or anything.

I knew not to expect drastic differences and just got it because i had the money and wanted 2 ps4s so my fiancé can play her games while I play my rpgs and such.