Another difference relevant only for 3D viewing is that the x35 has a superior glasses sync emitter which works on RF rather than IR. The X30 version completely blocks IR control of my M kit

Main system - Sources (Kodi-HTPC, Vero 4k, FireTV, Sat) into Trinnov Altitude 32 (8-16) (+Roon), Trinnov Amplitude 8 amp & Vivid Audio (Giya G3, V1.5) and REL Stentor III speakers. Others: F80 + Raspberry Pi and other Pi systems.