I have found the same thing....i am using a Nak DR- 10; have found the tapes sound better than the cd's.....much more detail in the lower range is revealed.....i have also found that when taping cd's, if the original source material is before the mid '60's, it will sound better on TDK SA w/dolby B than using Maxell XLII w/dolby b...I did an A/B comparison...i taped Reiner conducting Beethoven's 3rd Symphony from an RCA CD on both Maxell XLII and TDK SA... I found that although the Maxell sounded a bit "brighter", there wasn't as much "depth" in the lower registers, as with the TDK.....
The tapes in general, especially the tapes from cd's, sound much more "life-like", more natural, than the cd's.....