T1 rover is listed as having "a top speed of 8mph" but then you can boost it to about 12. This is fine for early game, and establishes a cool mode of transport that is improved from walking.
Then T2 happens, once getting going with later game stuff, and it is labeled as having "a top speed of 15mph"
... but that label is inconsistent with how T1 rover is labeled, because T2 rover's top speed is actually 10mph, boosted to 15. So it's really a very small increase in speed. On top of that, it's less maneuverable too, with slow turning and tough, wide cornering. It's surely an upgrade in terms of the slots it has, but when it was labeled as having a 'top speed of 15mph' I was expecting 15, and then boosting to like 20 or something.
Basically... I guess I'm just disappointed the vehicle isn't faster. Takes too long to get around places.