>>94794983.75 has existed since 1978.
Hasbro foolishly split the line when they introduced 6 inchers.
3.75 will never be as good as it was in the glory days.
6 inch will never have the same amount of character variety that 3.75 has, let alone vehicles, playsets, box sets, or monsters.
Both lines will forever be playing catchup with new media along with trying to update older figures, or even get basic ones in. (We still don't have Super Battle Droids or Droidekas for Black Series yet)
I'd got with 3.75, but be warned that a lot of the amazing older figures can go for $50+.
The modern 3.75 figures have stupid hip and thigh articulation that makes posing them frustrating.
Kuiil, Cara Dune, Moff Gigeon, the Armorer, Bo Katan, IG-11, & Greef Karga are in both lines.
3.75 has the better IG-11, and 6 inch has season 1 Greef while 3.75 has season 2 Greef.
6 inch is going to have Bill Burr.
Both lines have most of the Imp troopers.
You can only get different versions of Super Battle Droids and Dark Troopers in 3.75.
Alternately, buy the Mission Fleet, since it's the only line with a Blurrg.