[wrxtasy]

For a Snappy device, any device = a wireless remote = no more missed button pressings, no more Phone falling asleep. It really is the way to use Kodi in 2018.

But there are issues especially for poorly engineered devices with Bluetooth only remotes. You only need to browse the NVIDIA Shield forums to see Lots of complaints about 2017 Shield Mini wireless remote RF interference problems.
Devices with Plug in Mini USB RF receiver dongles are fine, like the Vero 4K, MINIX's devices and some MECOOL's.

For LibreELEC 1GB, 2GB, 3GB - it does not matter.
What does matter is the quality of device RAM, quality of eMMC flash storage, onboard WiFi/Bluetooth chipset and the Ethernet speed once you get into high bitrate 4K HDR streaming.
It's a few reasons why branded devices like WeTek, MINIX, Vero, Mi Box, Shield and ODROID etc cost more.

Having said all that the S912 Gigabit Tanix TX92 will be pretty decent Bang for the Buck for 4K HEVC - LE usage.

DIY LE can be installed to internal eMMC once you have it running from a SD card or USB Stick first.
But there are risks involved, particularly when upgrading. See the LE forums for details.
I've never done install to internal personally but it can be done.