You people claiming to have a difference can very easily prove it. For example @misio's ESI Juli@ has nice high quality analog inputs. Just connect cables from outputs to inputs, play a demo track in both foobars while recording the output and share the recordings here. I at least would love to examine the claimed differences.
Doing the recording digitally would make comparison easier, but that would require getting a device that can record the digital output of the card. And you probably don't trust recording done inside the computer on driver level.

ardftsrc filter have superior quality & speed compared to sox resamplers.

Question:  when using the exclude/include sample rates box, what is the protocol for entering multiple rates?  Are they separated by commas or semicolons, and is a space required?  For example, for a "resample ONLY" entry I have used:

22050,88200

Ivqcl sometimes used a semicolon instead (22050;88200), and in your SRC Resampler you use commas with spaces (22050, 88200).

Since lvqcl still hasn't released a 64-bit version I wanted to see if I can improve the quick conversion I did earlier.
Here's a new build that supports both 32-bit and 64-bit foobar2000 versions, dark mode is supported and now fast mode works also on 64-bit variant.

I also added options to resample only chosen samplerates or to resample everything else but the chosen samplerates, so it should allow doing everything mod and mod2 versions did in one file. I didn't see sources for lvqcl's mod variants so this is my custom implementation.