Okay I did my own test - straight comparison of an ordinary test shot processed with no alteration through Lightroom and Epson Raw (which I never even bothered trying before), then exported as 16bit tiffs into Photoshop.
Below is a screenshot of a small (random) section of the files side-by-side at 100% - and I'm TOTALLY amazed at the difference - not just color, but the Epson version preserves so much more detail.
I'm really disappointed, as I love LR, and the Epson processor feels clunky and dated.
Oh and the B&W conversion looked great in the Epson processor too!
Obviously a lot of that lovely detail is lost with jpeg compression for upload here - you'll just have to take my word for it! 😉
PS: and no this apple wasn't the focus object in the shot - but it just happened to be where I cropped the screen grab.