| Model Year | 2015 | 2020 | |
| Model | Porsche Cayman | Mercedes-Benz GLA | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 2dr Hatch | 4dr SUV | |
| Difference | |||
| Wheelbase | 97.4 in | 106.3 in | -8.9 in |
| Length | 172.4 in | 173.9 in | -1.5 in |
| Width | 70.9 in | 71.0 in | -0.1 in |
| Height | 50.9 in | 60.0 in | -9.1 in |
| Curb Weight | 2888 lb. | 3296 lb. | -408 lb. |
| Fuel Capacity | 16.9 gal. | 14.8 gal. | 2.1 gal. |
| Headroom, Row 1 | 0.0 in | 40.0 in | -40 in |
| Shoulder Room, Row 1 | 0.0 in | 54.8 in | -54.8 in |
| Legroom, Row 1 | 0.0 in | 41.9 in | -41.9 in |
| Headroom, Row 2 | 0.0 in | 38.4 in | -38.4 in |
| Shoulder Room, Row 2 | 0.0 in | 53.1 in | -53.1 in |
| Legroom, Row 2 | 0.0 in | 33.9 in | -33.9 in |
| Total Legroom | 0 in (over 1 rows) | 75.8 in (over 2 rows) | -75.8 in |
| Cargo Volume, Minimum | 15.0 ft3 | 17.2 ft3 | -2.2 ft3 |
| Cargo Volume, Maximum | 15.0 ft3 | 43.6 ft3 | -28.6 ft3 |
None of our members have yet commented on the seat room and comfort of the 2015 Porsche Cayman.
None of our members have yet commented on the seat room and comfort of the 2020 Mercedes-Benz GLA.