The red capture ring is what differentiates the Rolock 3 from the Rolock 1 and Rolock 2....the red capture ring is designed to be used with gloves like the SHOWA 660, 495, 720, and other gloves
without an attached insulating lining.
The blue capture ring of the Rolock 1 is meant to be used with size small and medium SHOWA 490 gloves with that glued in fuzzy acrylic liner. The black capture ring of the Rolock 2 is meant to be used with size large and medium SHOWA 490 gloves.
Other than the different color/diamter capture ring, as described above, there is no difference between the Rolock 1, 2, and 3.
The difference between the Rolock 1, 2, and 3, and the Rolock 90 is that the later is designed to integrate with the cuff rings of the Si-Tech QCS oval wrist ring system.
I typically dive with
Dakine Storm liner gloves, unless the water is uber cold...then I use a pair of the yellow fuzzy acrylic liner gloves from a set of SHOWA 495 gloves.
-Z