I like Kaup either, but I wouldn't be so optimistic.
Kaup is one of the most expensive producers in Europe (at least on polish market). Cascade is definitely cheaper.

I've been in Kaup factory two or three times and I liked, what I've seen. But Kaup factory is in Aschaffenburg, one of the most expensive towns in Germany (at least in Bayern). It defines the costs and prices.
Additionally, Kaup factory is just a throw of cake from the the main Linde site in Nilkheim and everybody in the bussiness knows, there are strong relations between those two.

In Poland Cascade has equally professional support, and the entire documentation (catalogues etc) you can download from their webpage.

I think, that today and in the forthcoming years the price policy may decide about the success or the problems. And Kaup is pretty rigid on this area.