I have a MB and TOM... as well as BM66 and SW (a pro, which I sold last year, but am picking up a premium this week as I ended up missing it a lot).
Both Sterns you mentioned are pretty fast paced and punish you harshly for missed shots. Lots of hurry ups as well. And yes, a fair amount of complexity in the code for both. Love them, but I'm also a masochist who enjoys punishing games as well as simpler flow-y ones.
The three games you called out that you own are super smooth shooting and intuitive... fun in a box for players of all levels!
If you're going to go for one Stern over the other, I'd go for Batman 66. It's deep, but really not that complicated... pick a mode, shoot the lit shots, repeat. Lots of stuff to discover without having to read an encyclopedia of rules.
My recommend? Grab a Dialed In if you're looking for something more modern. I think it would suit your needs very well.