I used to have some first-hand experience of the M491 widebody cars... and yes, the '88 491/470 cars with the 3.2 are much more GT than the early long-hoods (but then, really, what isn't?). All that leather and luxury costs in performance, and the 3.2 was tuned accordingly... plenty of torque and good passing acceleration, while looking coolAF.
The early RSR-type 491s with the 2.8ltr are, to me, the ultimate air-cooled 911 experience. Mine, with a full interior, reclining Recaro SRDs, front carpeting, etc was 2400# wet... I could easily have stripped it down to 2200 or less and still been (relatively) comfortably streetable. With the duck, I could still carry 3 figures into turn 8 at big willow without too much drama... pucker limited.
OTOH, I sold my 1986 930 Turbo specifically to find an M491 car... blasphemy perhaps, but I think for most purposes, the NA is much more usable. Sure the face-peeling acceleration when the turbo (finally) kicks in is a gas, but the 4 speed (<'89) was a luggy, laggy compromise, at least around town.
Still, a moderately stripped-out, slick-topped M491, with sport seats, LSD, and a massaged lump out back would still tempt me hard ;-)