Can you believe this is actually a smaller-bodied model compared to the original ATK shape? Those can be even heavier! The 200 (and several other more recent models) have a slightly slimmed-down body shape, it's not as wide as the original ones. Helps when looking for a case that fits. And the headstock is just slightly narrower as well.
I've had three MIJ ATK's from the 1990's and all of them were boat anchors - especially my 5-string ATK305. They were wonderful basses, and I somewhat regret selling my first one.
I've had them alongside a Stingray 5 for a few years, and as far as comparison goes I think they were very similar - both in weight, tone and feel. The neck shape of the ATK305 was a really close match to the SR5. The main difference in feel was the satin lacquer finish on the ATK (but polished to a gloss by years of playing) versus the oil finish on the Ray. Tonewise, the Ray had more clank and less mid scoop with all set to neutral, and was overall the more agressive sounding of the two. The ATK had a trimpot on the preamp board to adjust the output level, but even when matching it to the Ray it was still the more polite sounding of the two. Both had that distinct brightness but on the Ray this started at a lower frequency, it seemed, which helped it punch through a mix just a bit better. Both were fantastic basses though, and the ATK punched well above its price point.
Enjoy!