That's the thing... the RL1100 over a XL750 doesn't really get you a whole lot more really, you really only get a couple more stations to work with and a couple more features that are nice to have (like on-press swage, and the ability to dial in priming better, though most guys never even mess with that).
IMO the RL1100 is just a small step up from the XL750, it's not a big jump. It may be the top of Dillon's line, but it's not on the same footing as the Mark7 due to it not really offering more stations to work with.
Having 10 stations available, there are lots of ways to skin a cat: you can do every single step separately without having to compromise or combine anything, and can even try doing things in multiple different orders of operation if you like. The RL1100 just doesn't accommodate all that.
That said, the knock against Mark7 being swamped and behind with their orders is probably a real thing one should consider... seemed like a year or so ago their customer service was getting better after getting dogged for them being too small to really look after their customers, but that was before covid and them coming out with the Apex, so these days, IDK...
Funny thing I think needs to be mentioned here while talking about this, directly concerning the Apex is: one of the first things I noticed the first time I saw an Evolution in the flesh was "Wow, even for a couple grand, how can they do this?" - the machines were/are just made incredibly well, no plastic or stamped/cast anything anywhere to be found really (which is exactly what you get with a Dillon).
But, since by all accounts I've seen, the Apex is Mark7's attempt at making a cheaper and easier to manufacture Evo, one has got to go into that being a little weary... because when companies try to cut costs in order to make a cheaper version of something, usually doesn't work out so well...