If you are meaning the "LTR" and the SPS Tactical, there are several differences.
The LTR has a fiberglass stock made by HS Precision , a fluted barrel (big deal) and a black phosphated finish on the metal parts ( rough finish better grip)
The SPS has a crappy tupperware stock made by Hogue, a non fluted barrel ( a plus in my books) and a matte blue finish. ( smooth and black in color)
The actions, triggers and quality of workmanship is the same.
Both by the way are at this time non exportable from the US due to a new stupid rule of the week from the Dept of State.