Honestly the Beatles layout reminds me more of an EM than SS. As I've stated in other threads, to me, TNA feels like an SS made with modern tech (I guess that's technically all modern pins haha, but I'm referring more to the layout and feel). I'm personally not a fan of having loads of plastic toys in a game. I think TNA's use of existing ubiquitous parts to make their "toys" (danesi lock, drop target grid, reaction chamber (maybe these aren't toys per se, hence the quotes)) is clever, good engineering, and they're relatively novel. Granted, I'm probably biased because I'm not a huge beatles fan, and I have played maybe 5 games ever on black knight, whereas I've played probably 20 on a physical TNA, and probably close to 100 on virtual TNA.
Edit: Oops... poking at the UI, I may have voted twice :/