New LPs with CDs inside


Lately I've been enjoying LP releases with CDs inside, as opportunities to closely compare the current state of RBCD to vinyl and to determine where one's system shakes out in this regard. Some recent examples include Emmylou Harris "All I Intended to Be", Pretenders "Break Up the Concrete", Wilco "Sky Blue Sky." Has anybody noticed this and if so, what are your observations?
dgarretson
Radiohead, "In Rainbows" is my favorite dual format music software purchased in the last couple of years.

If you order from Radiohead's UK website you get two heavy 45 RPM LP's, CD and CD with extra material.

I burned the CD to iTunes and onto my iPod for the car while LP's get play in my main system.

I also bought the US vinyl which did not come with a CD. It's pressed at 33 and nowhere near the quality of the UK version.

I didn't buy the USA CD, so I have no comparison to offer about sound difference between it and what came from the UK.
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I've heard that the "Mudcrutch" (Tom Petty's band) S/T LP comes with a CD that uses no dynamic compression. The retail CD uses dynamic compression which would be an interesting comparison.

Viridian-> You've never thought of comparing LP's and CD's??? Critical listening is a big part of choosing components for our systems and specific recordings/formats that make the music shine. Nothing neurotic about that, IMHO.