Playing a french Reed on a German clarinet?

Question is in the title.

Is that possible? I know they're different, something about length of the mouth piece I think, but is it that server that I wont be able to play with the wrong reed?

I'm asking because I, living in Germany, play mostly German system and I want to buy myself an eb-clarinet.

Problem now is that I LOVE légère reeds, I've been using them for quite a while now, and now I've seen that they only have eb-reeds for French system clarinets. That's why I was wondering if I could use a légère reeds for French system on my German eb-clarinet 😔

(I also play french system somewhat, an orchestra of mine lended me their French system A-clarinet but I'm really not a big fan of the different system because I've been playing German for 9 years now and the tone is very different and if i want to play more professionally I'll definitely need a German eb-clarinet here in Germany)