Hueymeister,
Sorry to correct you, but what you are saying is not true...
The lowest clearance on the NH90 is 11 cm for the NFH and 18 cm for the TTH you are talking about.
The high cabin version is on the inside about 23 cm higher than the standard 1m58, but remember that for operating on board of ships and even on land the higher CG is a disadvantage (think about all the Puma's that were lost due to dynamic rollovers...).
You might also be surprised about how small in some area's the difference between the Puma and the NH90 is (build by Eurocopter, you will for instance see that the tank groups and the fuel control panel are almost the same).
And if you are talking about UK build NH90's: think about the partners that build the NH90: Eurocopter, Agusta-Westland and Fokker. It is the Agusta-Westland part that would make that possible...
By the way, the price you are claiming is also not correct; they are less than EUR 20 mil...