Yes, that's what I've concluded also, darker and a little compressed...and you've probably figured out that the first one is with the Studer plug-in. I've tried it on several tracks, guitar, vocals, bass, even drums and it seemed to have the most positive effect on bass. After lots of demo-ing I've decided it's not worth it for me. I have several other UA plug-ins that I'm very happy with though.
Thanks for checking it out, it's helpful to have other opinions.