E2B uses grub4dos but it can only be booted via the old BIOS\MBRCSM\Legacy type of system. However, you can both MBR-boot and UEFI-boot to grub2.
The advantage of this is that you can directly UEFI-boot to many ISOs that do not normally support UEFI-booting!
The disadvantage, is that each distro requires it's own unique menu.
If you need to UEFI-boot to linux, AV utilities, penetration test utilities, etc., then check out the grub2 add-on here.
Recommended for Easy2Boot (fastest!) - SanDisk Extreme SDCZ880-128G-G46
BitCoin also accepted.