Originally Posted by PaulC
I'm no PT57a or PPro expert, but got a friend who got a PT57a...
From my observation, the main diff is the beam width, PT57a is around 19-20mm, the Prestige Pro is slightly thicker, around 21-21.5mm.
I maybe wrong though, experts on this subject feel free to weight in or correct.
The PT10 is 19mm.
The beam width looks the same to me on a PT57A and MG/YT/IG Prestige Pro.