the RD IMO has more versatility in view of the pickup combo on board. it also has a warmer overall response due to the rosewood fretboard.
the ATK is a unique player as its triple coil pickup there gives off some 'missing' tones but some of us here don't find it too appealing. the ATK is recommended if you profess is slaps/ pops 8)
the following Ibanez bass reviews are available @ the database: