Bent 120 from one of the earlier years (Van or guitar top sheets) was very similar, almost identical feeling. It's gained weight since then, so not sure how current ones compare.
Moment Wildcat Tour is a much more well-rounded ski, it does 90% of the silly, light, almost too short feeling stuff the JJ UL excels at, while also being WAY more predictable and higher speeds, on bigger landings, in variable snow.
Those are the two most similar skis I can think of off the top of my head...