This is indeed very different from the first one - wich is cool. It's nice to see you're actually giving both sides enough room.
The first shot of the tank commander walking to the tank looks great! As said, some of the compositing could use a bit of work, but visually, this is already pretty interesting and very moody (Gotta love the nazi-flag shot!), even though a little too dark in places.
Never the less, I must admit I don't like this Teaser though for several reasons:
The voiceover acting doesn't sound believable to me, to say the least.
It sounds like someone reading a text, but acting wise - it's pretty off. Same with what he actually says. It sounds very much like written text, if you know what I mean. (Could be due to the delivery, I don't really know)
Same for the last shot where he yells "fire".
I know it's only one word, but even so, it's very badly acted. I hate to say it, but it actually made me smile - wich is the last thing you'd want when being dramatic.
The choice of music was good, but the sounddesign wasn't well mixed. I had to read some of the subtitles to understand what he was saying in two places.
And the first shot is followed by some odd sounds (Sounds like footsteps of the commander, allthough they don't match his footsteps at all and would be far too loud?)
Visually and from structure, this is up to par with the british teaser - even better in places. But the acting totally kills it and makes it very amateurish and even somewhat unintentionally funny.
I'm well aware that most of your target audience will be english speaking and so couldn't care less if the acting on the german part is any good or not - judging from my previous posters, they don't even notice. But for everyone who does understand german, this teaser falls flat and if the acting in the movie is anything like this, it will take severe harm.
And that would be a real shame since you put so much effort into your work and since the british acting, as far as I can tell from the other teaser, is on a much higher level.