You're right I probably shouldn't generalise like that, but my experience tells a particular story. One of our 156's is NZ new and was fully serviced (new cambelt, brakes) by the previous owner. I've hardly had to touch it in 5.5 years now (just did the cambelt again last month). Our other 156 was a recent import from japan and needed a new cambelt (9 years old and it had never been changed), new lower wishbones, new inner track rod, new gearbox mount, new rear wheel bearing, new brake pads front and rear, new post cat lambda sensor, and the air con didn't work (compressor shaft seal, still not fixed). Oh and the tranny fluid looked like something had died in it. Having said all that the engine oil was as clean as could be.
I also wondered if the head unit could be changed to NZ spec for the FM band with a switch on the back or something like that. Did a search on here once but didn't find anything.