Both a Mech Warrior and Variable Fan here. I always prefer AND to OR and consider anything less to be falsely and wrongfully limiting One's Self unnecessarily.
Both have their Strengths and Weaknesses as does most everything. Why we all have this inane inherent Compulsion to place subjective Non-Comparatives in a fraudulent self-defined Hierarchy then argue about the Merits & validity of our own personal Choices is as freaking hilarious as it is abjectly asinine.
But hey, that's just me. Feel free to differ. Honestly,,, please do. Makes for great Entertainment.
Anyways, Love my Mechs - Love my Variables.
Get Educated (not really that much and definitely not that hard or complicated), get a Mech, get proper Accoutrements, get practiced and familiar, develop good SOP & Routines, then enjoy the Hail out of 'em as I and many others do. Simple Concepts really. Once ya Learn them & Know them it ain't hard or dangerous to Live them.
IF One has valid or proven reason(s) to doubt their own Intellect, Common Sense, Corrigibility, Abilities, Aptitude, Attention to Detail, Yada Yada; then by all means please refrain.
Then again, if that is truly the Case, it logically follows One has a lot bigger Problems and Issues that need attention other than choosing an appropriate Mod for themselves. Might need to address those first and grab an Ego & some CE4's and just let the rest go and be Blissful.
As 20th Century Philosopher Eastwood said in his Cinematic Essay
Magnum Force; "Man's GOT to know His Limitations"
All the best to the OP in whatever they decide and here's to doing so Smartly and Safely

Enjoy & Vape On!