Thanks for your answer!
In your first mail, you write
> Zita-ajbridge will detect the relative period phases, and insert buffering so as to ensure that the difference in latency is always the same.
That sounds to me like the two cards get additional latency, but it will be exactly the same so their outputs remain in correct phase.
However, in your second mail, you write:
> Without resampling the samples will not be modified, but the latency of the two cards will not be the same (but the difference will be repeatable).
That sounds like the very opposite.