I've started pushing the engine harder now that it has approx 5,000km on the clock, and I've noticed the GTi is very prone to axle tramp when the tyres slip under hard acceleration.

I had a Mk V 2.0 TDi before getting the Mk VI GTi, and I don't remember ever experiencing any axle tramp at all.

Is the Mk VI GTi really more prone to axle tramp than the Mk V TDi? Does this mean the TDI has harder engine mounts than the GTi?

Will the engine NVH be noticeably worse if I put harder engine mounts on the GTi?