When one visits a tailor, the number of measurements to be taken is not fixed. The tailor, of course, has a routine; indeed, many, if not most, have a measuremtn form and go through it methodically. But it is not limited to that. Some clients may ask for a more to be taken for peace of mind. Whatever you want, that's bespoke. Of course, a fixed number has been taken for a suit when looked back retrospectively. How could it not? That's like saying that at the end of the day, you can look back and describe the course of events you've experienced in order. Bu tin the morning, no matter how much planning has been done, you can't forecast surprises and routine happenings - say someone, unexpectedly spills coffee on your shirt, requiring you to make a detour before your meeting, for which you arrive late, and then a multitude of possibilities spill out from there - bespoke is about possibility - the possibility for anything - the turn of events could be compared to a client walking in with oddly shaped shoulders that need to be addressed secially, with additional care and measurements. In contrast, the number of measurements that Baron take is fixed from the get-go. That is a big difference, conceptually.
It may be that Baron make a fresh pattern for each client, but I think it is probably not appreciably better than a MTM one. Consider that the real step up from MTM to bespoke in terms of fit is for addressign not chest siaze, waist size, etc, but posture, shoulder slopes, curved legs, etc. They also almost certainly use standard ratios and rules of thumb for specs like shoulder slope - square, normal, sloped. Jantzen do the same, and they don't make a new patteern for each client, but it is very adjustable. I would not be surprised at all if that's Baron's MO, too.