Each school teaches a specific style. There is no 'regular' karate. There are many similarities between all of the styles, with a few differences.
all styles differ from one another and no style is better it all depeds on your personal skill level
It is not a matter of style. The key is the application of the techniques. It is more the individual practitioner than it is the style.
It would be hard to name one as being better than others. It has more to do with the practitioner and how hard they work then the style.
shotokan style
The Wado ryu Karate style mixes the two about 70:30 to karate but I'm not sure that is what your looking for. Are you looking for a specific style or anything that combines the two?
Daniel Larusso got taught Shotokan Karate in the Karate Kid
You can pretty much find any style of karate in Germany that you are interested in, including:Shorin ryuTang Soo DoTaekwondo!
You would find the listings in many of the karate histories. The book Okinawan Karate: Teachers, Styles and Secret Techniques by Mark Bishop provides hundreds of senior practitioners and their lineage.
Its an Okinawan style of Karate.
Wada ryu karate is a form of karate that has influences from all the main styles of karate, but the only differences are in the kata's. for example, the pinan's and unsu are from Wada ryu style.
American Karate is a style based on karate from Asia. It has been changed by Americans for various reasons, some of which is to approach the American style of fighting. There is also American Kempo which may be the same thing, depending on what school or system you are working with.
Japanese karate