Just to be clear - RSU 1.0.0 is based on official 1.6 firmware? RSU 1.1.0 & 1.2.0 are based on official 1.2.0 ? If so, then going to try RSU 1.0.0 and 1.2.0 sometime soon.
I`m guessing RSU 1.2.0 will be better because I liked SUEX 1.2.0 sound. Still, despite RSU using pre-installed theme, I`m not sure if I`m going to like UI more than Mango but we`ll see