Help choosing the 'right' AP System One

Hello,

I was given a Portable One years ago, at this point i had no clue about deeper audio measurements, but over the years i learned myself how to use this device and how to measure the circuits i work on. It became a very important part of my workbench.
I repair solid state amps, analog mixing desks, passive speaker crossovers. I also do a lot overhauls on used analog studio gear. Sometimes kind of prototyping, building speakers and little audio devices.

I am at a point where it is a huge PITA that i cannot A/B my measurements or save and recall them later. I know there are possibility's (adaptor + software solutions ) to print from the P1, but they are kind of expensive for what they are.

Long story short: the local broadcaster sells System One's. They have 3 different versions an I'am not sure which one to take. I know that Udo's interfacing cable work's with APIB, but as you can see on the photos, the other System One connectors are marked with "Digital Interface".

Digital Interface = APIB?

The costs including Udo's Interface would be about 1k€ which is a decent price i guess. The switching units are about 100€/pc.

I would prefer this model:

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They also have this one (upper device)


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And this:


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As well as, this switching units:


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Any comments and help very appreciated!

Thank you,
Georg