My first Note 20 Ultra was the Exynos soc and on the whole it performed admirably, however mine appeared to have network connection issues.
I returned the phone to Samsung UK within 28 days and then proceeded to import the Samsung Note 20 Ultra SnapDragon soc from Hong Kong and the difference was night and day between the two soc versions.
Exynos has definitely come on in regards to how it performs recently however.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help.
It is funny you mention that, I have purchased the iPhone 13 pro max I just have to wait until early December to receive it.
I have had the note20 since March last year so another month won't kill me.