Oscilloscope probe questions

[Sniper1]

So I know when to use ac coupling and differential probes. But what is the use case for ac coupled differential probes? Asking since besides rf stuff I can't imagine a use case where you would want ac coupling instead of dc. Maybe to reduce input capacitance a bit I can't think of anything else. Can anyone enlighten me please.

Also what is the proper schematic?

I know that this is the simplified schematic for single ended DC and AC coupled probes
For differential DC it is this:
https://postimg.cc/d739NDb6
But for AC coupled differential i cant get some good schematics online and am not sure if it is something like the upper one or the lower one?


https://postimg.cc/23kn01nZ

The upper one sort of makes more sense since it is symmetrical input but i am not sure if it is useful IRL since it will only probe pure AC signals

The lower one makes sense in the way that it uses a line as a reference then removes the DC offset from another line BUT it will distorts the thing that is probed a lot more on 1 line then the other .

Can someone please explain how AC coupled differential probes work ? or direct me to some good resources? (not sure if they even exist IRL [i sort of filled the gap  in the probe types....)