Yep, as
TTT said, it's the same...
In fact, the base models had the "special" suspension and brakes.
GXL is the "loaded" model, and the turbo (i.e. Turbo II) is a GXL + turbo engine.
The 1998 "GTU" + 1989 / 1990 "GTUs" are just GXL models minus all the heavy (i.e. powered) shit and some special features (i.e. no sunroof, but amazingly there are some that did come with sunroof).
The 1986(?) and 1987 has a "Sport" model available, and this was a precursor to the 1988 "GTU."
The brakes are standard across the board with the exception of the base models; this is for the 4-pot fronts with vented disc and 2-pot rears with vented disc.
This big brake or heavy-duty brake package were on all GXL, turbo, and convertible models + the abovementioned 1988 "GTU" and 1989 / 1990 "GTUs" models.
Brakes on base models - 1986 / 1987 "base" + 1988 "SE" - had the 2-pot(?) front with vented disc and single-pot rear with NON-vented disc; these were obvious due to the 4-lug wheel lug pattern.
In 1989 - 1991 base models, all FC's were 5-lug wheel lug pattern, but the base models had different brake calipers and discs.
(Forgot some of the specifics here...)
Let's see how long before the corrections come flying in...
-Ted