Question—Mach 1 vs GT500

I have a 2023 Mach 1 automatic HP, 4500 miles…stock…

Am considering adding a whipple SC …OR spending a little more money and finding a GT500 with similar miles..automatic…I get Mach 1 + Whipple = approx $70k…and GT500 probably $25k more than that…but also when I sell Mach 1 I won’t get the whipple mod $ back probably….and GT500 will always keep a better residual…

So pay less now get less or pay more now and have better investment??? Also how is GT500 for a ride? Too stiff to run errands or still a good ride? Any feedback appreciated