The only relevant acronym is MIPS, the rest seem to be naming conventions for helmet models or similar technologies. MIPS stands for Multidimensional Impact Protection System. It is a sort of shell inside the helmet touching your head that can rotate independently of the helmet its attached to. This reduces forces on the brain by allowing the helmet to move slightly relative to the head during an angled impact. This helps protect yoru brain by mimicking the natural protective mechanisms, such as the meninges and cerebrospinal fluid.

TLDR: buy one with MIPS or similar tech and chances are pretty high it’s a good helmet, safety wise. Comfort is subjective and not unimportant.