i know of different jjj styles.
Really? What do you know of them? Because, honestly, if you actually had some understanding of them, you would have understood my answer… and, likely, not asked the question in the first place.
if jujutsukas are here, they could name her style and tell about their focus,
And exactly who do you think answered you?
Thing is, as I said, you need to be far more specific in what you're asking for comparisons between… the person answering you would need to be aware of their own system, what sets their system apart from others, they'd need to be familiar with your system, what sets it apart as well, have a deep enough understanding to discuss similarities and differences clearly, and you'd need to have enough of a grasp of all of the above to be able to actually follow the answers.
Here's the biggest issue, though… it's not about techniques. It's not even about technical differences. The reality of the differences are based more in concepts of ri-ai, hyoshi, ma-ai, and so on. You can't even say "this one focuses more on throws", because the exact nature of those throwing methods are based in the other ideas… and will frame the form for the throws, the set ups, the context, and everything else…
just for curiosity, not for deciding to switch to another style.
Then your first step is educating yourself on exactly what it is you're asking.
also for being originally created out of karate, judo and aikido, german jujutsu is very well related to japanese arts.
Please. There are certain traits found in Japanese arts… and, pretty much universally, when a new system is created, particularly Western, out of disparate elements in this way, it loses all trace of being a "Japanese" art…
it seems you want to spite me a bit and by the way, i don't care about the roots, traditions and doing robot-dance aka katas, i care about effectiveness and comprehensiveness.
Then don't worry about Japanese jujutsu… other than your very off-base idea of "robot-dance aka katas" (so much wrong in so few words there…), you've just basically said you don't care about it at all.
otherwise i wouldn't have left my former karate club. so for example the less karate striking trainingmethods but muay thai striking methods is in the now further developed gjj, the better.
And then emphasised that you really don't have any interest in Japanese jujutsu.