So I have to wonder if you have a hero type prop that is machined and plated and if the stunt props type plating/ paint couldn’t exactly duplicate the look or maybe not concerned as 99.999% movie goers would ever care about such things. Or there is always the possibility that the plating changed color over time and that the hilt may look different between pre and post production.
There was never a metal version of this hilt made for production. The majority of the hilts at the time of RotS were 3D sculpted and printed, cleaned, and chrome plated or vacuum-metalized. With this kind of production, they were able to make a number of these things pretty quickly to test paint methods and finish. There's three examples just posted here, who knows how many they ultimately went through before the final was approved.
So it seems to me that if we are talking what is identifiable on screen, then we are looking at the "Version 1" which would be what we see in the close up in Palpatine's hand right before he fights Windu, and the "Version 2" which is probably a painted stunt version trying to mimic the color scheme, seen in his hand of the one shot during the Yoda duel?
This is correct as far as I know. However, whether the V2 seen in the movie or the stunt version came first and influenced the other, I don't know for sure. Seeing as Lucas had to sign off on everything, including props, I think the V2 "hero" came first and that informed the look for the stunt hilts that followed it.
These are some quick screencaps from the BTS footage for RotS' fencing stunt hilts:
Here's the Palpy V2 in the upper left in the bottom drawer of the hilt "cupboard."
Drawer #2 and #3 have four (or more) Palpatine fencing hilts in total from what the video shows, all done in the V2 color scheme. There aren't any Hero Palpatine fencing hilts as that was originally Anakin v. Windu and the Skinnyflex stunt was used.
And here's something fun, paging
thd9791, they actually had the Barbican and V3 in possession, and maybe an Icons Graflex, to work off of to make the hilts for Ep.III. To not completely derail the thread, the Palpatine Hero is also in the "Hero" hilt box.