It seems to be the same: lenght (175 cm), width (68 mm), radius 16 m. But colour :) Testers speak about them in similar way. They should be less agressive than older Kasle RX 12 GS. (But I have one pair, maybe 10 years old, white one, 184 cm, they are friendly as well).
I have 19/20 model (b&e with red tip) 182cm length. It is very friendly ski, something between GS and allmountain. I am 57y old, 175cm 77kg, no problems with 182cm. I also tested shorter lengths, but they were less stable.
The later model (with blue-green tip) is a bit stiffer, more GS ski and less allmountain.
I am 76 kg, 175 cm, 76 years old,good level. I have Kastle 183 cm/R 20 m. (black-red)- I recommend 183 cm. It's a good comfortable ski