>>2019827I do Bolognese, so I can talk about one with far more confidence than the other.
Lignitzer is a bit hard to work with/interpret. If you can, it's definitely good though. It's also quite short of course, but you can supplement it with other contemporary German S&B sources. Even those that aren't as close to Liechtenauer, like Talhoffer are still very compatible, or so I've heard anyway.
I've been wanting a friend of mine who's really big on it to make videos, but he hasn't so far. If he eventually does it'll be a great starting point for S&B.
Bolognese is fantastic, probably the objectively best school for S&B and related weapons. Getting into it is fairly hard though, mostly for terminological reasons - there's shitloads you'll have to memorise. The upshot is that you get an incredible wealth of information once you understand it, a pretty damn complete system that includes plenty of other weapons as well.
Personally, I think the best Bolognese sources for S&B are the Anonimo and Manciolino. Marozzo is messy. Look up Ilkka Hartikainen and
Marozzo.com (same guy) on youtube for a good starting point, then read the introductory part of the Anonimo (everything before the plays), using the Stephen Fratus translation. Then you'll get a fairly good idea of what it's all about.
>>2020442I.33 is weird in that it's fascinating (mostly because it's such an early source), but the fascination with it has held back the development of S&B fencing. It doesn't provide much useful information, and it's extremely hard to interpret. Basically every club that studies it comes incredibly different conclusions, unless they're on the Warzecha bandwagon, in which case they all come to the same, equally retarded ones.
There are plenty of other S&B sources that don't get the love they deserve due to I.33's popularity, and the vast majority of them are superior to it in terms of usefulness.