Not meaning to flame anyone but... I've been into loading for some 42 years. Used a lot of presses of various friends, own a few and know of quite a few more. The determined loyalty to big green has always amused me. I have never heard of anyone with any cast iron press having a failure or wearing it out. (Loose yes, but worn out, no.) After all, presses are very simple devices and the few moving parts move very slow. An occasional drop of oil will keep things moving far longer than any of us will care, and the color don't matter.
A compound leverage, cast iron press from any maker; Lee, RCBS, Hornady, Lyman, Redding, Bonaza, etc. is fully as good as any of the others. But no better. Sure, the early Lee presses were all aluminum alloy and could be broken by ham-fisted users but that was more their fault than the tool's and I'm only addressing iron presses. And big green makes an alum press too, so where does that mindless loyalty end? Remember, I'm only talking about iron here, guys.
The features of individual tools determine what I keep and use, not the color. My 20 year old RockChucker II has a lousy primer system. The poor primer "catcher" drops half the spent caps onto the floor and the ones it does catch get trapped under the priming arm to eventually lock it up until I dig the offender out. I finally gave up on the RC for any part of priming work, now use a little Lee "Reloader" press and universal decap die to take them out and a Lee "AutoPrime" tool to put them back. But I grant that the RC is as strong as any other.
Sure, my RC is over kill for strength and will last a long time but that's also true with my 42 year old Lyman "Spar-T" turret. So too with my buddies Lyman "Orange Crusher" and Redding "Big Boss". Etc. They are all good, it mostly depends on what features each of us like and need. Or maybe how much we need to spend to bolster our confidence in our tools.
I think the new RC "Supreme" was produced in reaction to the new Lee "Classic Cast" press. Both are big, strong presses! But, being honest, if there was a test for the "strongest" currently produced single stage iron press, the Redding "UltraMag" would win. The Lee "Classic Cast" and Foster/Bonanza "Co-Ax" would tie for second strongest. (And the Lee has a great ajustable lever and good primer catcher system, at less than one third the cost of a Co-Ax.) All the other presses would tie for third place. So what? Each one is far stronger than it need be and will last far longer than it will need to.
A press is likely the least important factor in accuracy reloading, far behind good technique, good components and good methods. The only press that has an edge for accuracy reloading is the "Co-Ax". All the others are tied for a close second place.
I like my RC and other RCBS tools for what they are but no inamimate object is worth my undying loyalty, no matter its color or logo. My hard earned money goes to whom ever gives me the best balance of utility, features AND price. In presses today, that's the Lee.
All in my humble opinon, of course!