EFI on startup disk vs that of the USB installer

Hi, I’m currently backing up my installation of Sierra, having finally got all the configs right. Obviously the back up won’t keep the EFI partition which I’ve been meddling with on the startup disk. Can I copy my EFI partition from the startup disk, overwriting the EFI on my usb installer, so if I end up breaking my drive I don’t have to go through all this frustration again, with all relevant info already on my usb? Or is the EFI partition slightly different on the usb installer?

Cheers!

submitted by /u/DrewwwOG
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