See manuals, they have technical information and even information about converter latency.
As you need a recording interface (as you discovered already yourself), the UFX III is an excellent choice, as it gives you
TotalMix FX, excellent analog section, very fast converter, quality preamps with 75 dB gain range, comparable to those from 12Mic) and an excellent feature set (SteadyClock FS, FX, DURec, Autoset, …) and at the end it's expandable through MADI and thus can be your companion for a very long time.
802/UFX II is no alternative (MADI missing) two ADAT ports are not enough for double speed and/or further expansions.
UCX II is definitively no alternative, only one ADAT port (8ch @single speed) definitively too few channels even at single speed (44.1/48).
You could only think of getting perhaps
- HDSPe MADI FX (PCIe based with 3 MADI buses)
- MADIface USB (no preamps … More or less "MADI only", a little bit too minimalistic / "to the point")
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub14