Anyone Demo'ed an updated 32.5(newboards) versus a 72?

Hi---again!!

I've previously posted--on my current system upgrades and am very greatful for the advice recieved
CDi S/H on its way-thanks for the advice
Hicap added--incredible difference!!!

And for the preamp?
I discussed things with Naim on the phone whilst
arranging a service for my 110(very helpful)
The impression i got was that the main difference between a newly serviced 32.5 and a 72 were the newer input boards--esp the CD input
So
1)will there be much of a sound quality difference
between a 32.5 and a 72 with the same boards fitted on cd or phono(the only ones I care about)

2)Are the 72 phono boards any different to the 's' moving coil boards I run in my current 42.5?

3)can I buy the 72 CD board(?pair) with its inbuilt filter on its own for a 32.5 without worrying about upgrading the tuner or tape boards?

The reason I ask is that a 32.5=£220(I can look for a recently serviced one)?£50 for cd boards
----- a 72 is twice as much----could be put to my cartridge fund.

However if there is other inherent improvements in the rest of the 72's circuits/componentry then the extra outlay is probably worthwhile.---
????especially on CD which predates the launch of the 32.5.

Cheers
Richard Paget