Yes, the Tab Top is just another version of active idle. It's pretty nice looking but I prefer to use the regular idle mode and use button shortcuts.
Also, I did a warranty exchange on my old version, got the new "Tab Top" firmware version and it is, for sure, A2DP compatible. Tried it with my wife's stereo bluetooth headphones and it worked like a dream.
Finally, we get A2DP on the N75 without having to go through all the unbranding mess!