The best thing about the RetinaZ2 is that you can pull the RAM off the card and stuff it into your A3000 as Fast-RAM (most of those cards are bought for this reason today).
The RetinaEmu isn`t bad (had a RetinaZ2 for a short time myselfe) but since it isn`t CGX/P96 compatibel I wouldn`t suggest it for serious use today.
It`s a nice enough card for a toyaround system but not if you are really useing that Amiga.
