Very nice. But I prefer the M3W passenger space and roll hoops... even if they are not engineered as well! Looking forward to seeing more of Pete's next 3 wheeler...
I definitely prefer the structural steel roll bar (temporarily removed in these pics of #13) to the thin steel hoops on the M3W; I do agree that the hoops look better but are not much for safety. My passenger in ACE #10 is also pretty petite

I'll also note that the rack (curious about no boots on #13) in front makes for light and precise steering, it also allows the engine's center of mass to be behind the front axel line for better weight distribution.
Let's not make this about ACE vs. M3W, as that really just distils to a personal opinion.

ACE#13 here is really about an amazingly rare and exquisite machine, that is also a significant piece of 3-Wheeler history.