My impressions of my first Prime Master: Vector Prime
This is from the first POTP wave and I could see some differences with the Titan Masters that we've seen for a while.
The belly screw has been replaced with a flat head that will limit customization. Although in recent pictures it looks like Wave 2 and up of POTP will bring back the screw.
The details and surface is much more defined than Titan masters, the borders and angles are much more poiny which makes the tiny figure look properly finished.
In the case of Vector Prime, the face datails is very well done. It has silver paint applied, compared to the unpaunted and less molded faces of Titan Masters, this looks much better.
Vector Prime (Prime master)
Hasbro Power of the Primes