I got two transmission, ones out of a 03 GP but is non-hd, the other is out of a 99(I think) GTP and is HD of course. From what I was reading the 03 is a better transmission?

So my question is, should I use the 03 tranny and do a HD swap with it for my Top Swap I'm doing? or just throw the 99 tranny in and call it a day.