Dubbin said:
Look at the pictures above and you will see there is a pretty big difference.
I don't have to look at the pictures, I have all three in front of me right now, side by side. The PSR-500 is smaller than the Pro-96 and the biggest "tangible" difference between the BCD396T and the PSR-500 is the thickness when you're holding them one in each hand. However, when taking into consideration the belt-clips, the BCD396T is more cumbersome to hold in your hand.
Also, I know this might also be considered nit-picking (it goes both ways anyway) but the size trade-off for a smaller size radio becomes negligible in the end, especially when considering the usual better audio, etc. on the GRE. I used the BCD396T exclusively on a daily basis for a long time and I had no problems adjusting to the (yes, I still believe) slightly bigger size of the PSR-500. In other words, I don't think the size difference should be a deal-breaker when somebody is trying to decide between one and the other.
BUT as they say: YOMV (Your Opinion Might Vary)......