TT02 stock with 70T spur and 26T pinion is a bit faster than a 55T with 27T tt01. Not sure if the ferrari aero is good compared to VW Golf. Overall happy with the purchase. not so much vibration eventhough the shaft is plastic.
26/70 in the TT02 is not a recommended combo by the manual. Ratio is 7,00.
Gear mesh could be a bit tight. You should keep an eye on it.
27/55 in an TT01 is the ratio 5,41 and much faster regarding topspeed. If your TT02 is faster in this constellation, then your TT01 is broke.
You should check the drivetrain for drag or worn bearings...
Br,
Matthias