Ah, Sorry Okay. I looked at the link before I posted, but couldnt see what you were talking about, but I do now.
I think the 150 MCE kit is simply a PVR150 card with an MCE remote included. The 150MCE is physically a different card that has the FM tuner in it.
Im assuming the 150 MCE kit is for people who want the MCE remote bundled in with the card, yet don't want to use the actual MCE operating system. (which is dumb, because the 150MCE will work perfectly well on any other OS.) It's all marketing confusion.