I'm comparing one or two other brands to Subal because that is what I own now. I dive a lot (well, maybe not as much as Alex) so ergonomics, toughness and smooth, reliable controls are the major selection criteria for me.
I don't think Nexus is available in The Netherlands, I never saw one in the field. Aquatica looks interesting but in The Netherlands it is sold through a regular camera shop with no expertise in underwater photography and there is no service. What also counts is that my ports and viewfinder are in excellent condition so I can continue to use these if I stick with Subal.
I will probably make up my mind after the BOOT show in Dusseldorf, Germany.
Personally, I think, main difference between Subal and Nexus is size and price. Both product are well done engineering. But if local support is critical, of course better to stick what is available.
I gave up on a much-loved Nexus system because I couldn't get the support that I needed. So far, Nauticam has provided excellent support...
Tim, do you mean for sales or after sales? For distributor or consequently enduser ?