Default [Q] Qus about the new TWRP

I want to flash the new TWRP recovery using CWM (Clockworkmod Rec), but i have a backup file (stock rom) from my CWM,

My question is:
IF i want to get back to stock how can i replace the new TWRP with CWM and restore my stock ROM ?
OR is it possible to restore CWM backup file with TWRP ?

Thanks