ShipModul 3Wi-N2K vs QK-A034B: which one?

[Mariannabld]

Hi. After several days of research and studying, these two are the multiplexer that should help me reach my goals, BUT:
in Europe, the cost of the ShipModul 3Wi-N2K is almost double than the Quark-elec QK-A034B, and I can't figure out exactly why.
Based on the User Manuals of the two products, these are the differences I could understand:
1- ShipModul has two NMEA0183 out ports; QK only one
2 - ShipModul clearly states that all the in/out ports are galvanically isolated; the QK apparently only the input ports are galvanically isolated
3 - the ShipModul's configuration software allows for lots more adjustments.

Do these differences justify a double price, or shall I assume that there is more in the construction and/or capability that I've missed?

I'd appreciate any suggestion from anyone with experience in these two multiplexer.
Many thanks

[ChristianV]

As far as i know Quark A034B provides three NMEA inputs and SeaTalk input as well.