Yes, RC1-recomp-03 is newer than RC1 (w/out recomp). You might say it's...Obvious. However, it's not the newest, because now there's RC2. And it's the best yet if you value skinability, but it has different functionality depending on your hardware. More info here:
http://forum.xda-developers.com/showthread.php?t=636423
Nice skins start on page 29 of the above linked thread.