The henchmen variety in the PT

The OT had one main type of Stormtrooper.

The Snow Troopers had different armor designs but still functioned like typical stormtroopers.

The Scout troopers used pistols and speeders but ended up having little screentime once the Battle of Endor started.

In the PT we got the B1's, the B2's, Destroyers, and the MagnaGuards.

The B1's are fodder with strong numbers.

The B2's have bulky armor and use wrist blasters.

The Destroyers have their energy shields and powerful blasts.

The MagnaGuards specialize in melee which allows them to fight Jedi in CQC.