S.T.A.R.S. Samurai Edge Custom Beretta
Chris's Custom
-Chris' Samurai Edge had been upgraded with a blued finish slide and a silver trigger. In addition minor internal modifications were done to make it a competition-capable weapon, such as a medium-weight slide and adjusted trigger pull.
Jill's Custom Samurai Edge
-Jill's Samurai Edge has been upgraded with a silver trigger and magazine, a standard sized slide-stop lever, and the logo on the grip is a much brighter shade of blue.
Barry's Custom
-Barry Burton had a heavily customized version of the "Samurai Edge." It fired .40 S&W caliber bullets and featured a longer barrel and compensator for increased accuracy and stability. It also has a red S.T.A.R.S. logo. In Resident Evil, it is available to Chris and Jill as an unlockable weapon, and it has unlimited ammunition.
Wesker's Custom
-Albert Wesker's weapon is the most heavily modified Samurai Edge, with the exception of the Barry Model. Wesker's Samurai Edge has the lower frame and takedown lever replaced with Inox (stainless steel) parts, in addition to a skeleton hammer and Brigadier sights.Wesker's handgun also features either an integrated Vertec style accessory rail on the bottom of the frame, as well as a beavertail horn—a feature that was introduced on the 92 platform, but never put into production.
Rebecca's Custom
-With the exception of a green S.T.A.R.S. logo on the grip, Rebecca Chamber's Samurai Edge is unmodified past the original Kendo design. This is probably due to her having been in S.T.A.R.S. for less time than her teammates.
Brad's Custom
-Brad Vickers, a deceased member of S.T.A.R.S, also has a heavily customized variant. It has a compensator, like Barry Burton's. The fact that they have compensators is similar, but the look is different. Brad's compensator looks like the compensator from the movie: "The Punisher". This Variant has PTP Grips (Ergonomic) with Samurai Edge logo on it. Also, with silver body, and magazine.
Other S.T.A.R.S. Members
-It is presumed that the rest of the S.T.A.R.S. members also used unmodified Samurai Edges. It should be noted that during the intro movie of Resident Evil Zero, S.T.A.R.S. Bravo Team (including Rebecca) all have lights attached to the frame of their Samurai Edges. However no such attachment is ever used or seen ingame, nor does Alpha Team have this attachment during the intro of Resident Evil Remake. It should also be noted that during the RE Remake intro, Albert Wesker can clearly be seen holding a flashlight in his left hand while searching for Bravo Team. This is strange considering Wesker's Samurai Edge is one of the two in the series that has a confirmed rail.
Source:
https://residentevil.wikia.com/Beretta_92F_Custom_'Samurai_Edge'