If you use DTX, RxLev_Full has a value let’s say -91 dBm, RxLev_Sub greater than that let’s say -68 dBm, while in Idle mode RxLev_Full=-65 dBm. So, RxLev_Full (Idle) is aprox. equal with RxLev_Sub (Dedicated) and RxLev_Full (Idle) is about 26 dBm greater than RxLev_Full (Dedicated). Of course,not allways. Whenever DTX is used, you’ll have that difference.
Regards,