Hi Steve, welcome to the RME user forum.
I try to answer your question as good and honest as I can. I migrated from Focusrite to RME many years ago.
To answer your questions briefly: you won't be disappointed! Sound quality is excellent and the DSP mixer TotalMix FS is the best I ever saw, a very stable and mature product. One product for all recording interfaces since over 20y. Lag free and which gives you a lot of flexibility.
My experience to this topic:
Many manufacturers have to make many compromises in their device design (including drivers and software). This is the only way to sell a product as a mass-produced item based on price.
Product lifecycles are then often shorter. Since external developers are typically used, there is not much product maintenance once a project is completed (short product lifecycle).
RME takes a different approach. Here you get professional devices that are designed with great attention to detail and are even improved over the years through firmware and software updates. This is possible by design, as RME uses FPGA ("programmable CPUs") which can be reflashed with new code. Nevertheless, they are still affordable and give you an excellent value.
There are simply too many details in which RME sets itself apart from the competition in terms of quality for me to keep re-typing them.
That's why I wrote this blog article on the subject. I just made some updates.
https://www.tonstudio-forum.de/blog/ent … -aug-2024/
My setup and use cases you can look-up in several blog articles, a good overview you can get here:
https://www.tonstudio-forum.de/blog/ent … iii-en-de/
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub14