Everything is under same level of scrutiny. Nobody can say this with 100% confidence that USCIS will be lenient for a specific type of H1B application. So, assume that it will be looked into carefully.
In case of amendment denial, previous H1B’s approved date will be binding and you will have to go back to your old role, if you want to continue working.
Your employer can withdraw your H1B amendment anytime, even during the RFE phase.