Usb stick or sd card

Can anyone clarify which is the most stable memory to boot C E on, usb stick or sd card? I know running from emmc is the most stable but need the back to android option.

If you’re on amlogic-ng build (newer device) you can use ceemmc and run both Android and CE off eMMC and keep dual boot.
Other than that, both SD or USB suck reliability wise. Speed depends on the particular drive you get, there are good and bad usb drives and sd cards.

Thanks for that, its for a gt king pro which I had CE installed to internal running well but using the latest nightly as I needed the brightness control not in the last full release. Will look into the dual boot option from internal.