Experimenting with several boot managers for the same system (Arch Linux) to compare boot times Systemd boot, syslinux, grub, and refind are listed from top left to bottom left, respectively. Every boot manager has been set up using UEFI.

If you utilize any of them, you already know which is which; if not, this grid will make that clear to you.

1- SystemD boot 2- SysLinux
3- GRUB 4- rEFInd