Observation: The Cayman GT4 commands a $30k+ premium over the AMG GT
Talking used prices for 981, so roughly same model years, with similar mileage. This honestly surprises me. Not that I've driven either one, but their MSRP was similar and I didn't expect the difference to be so drastic.
I guess the same could be said for depreciation curve on Gen 2 R8's. Seems like the "super car from non-super car brand" category isn't a huge hit in terms of residuals.