There is no answer about that question.

Yesterday, we had a discussion after visiting ZKM.
I just think about the question when I am taking the train.
What are the differences between ZKM and Transmediale?
Someone said TM is more talking about political aspect and also making open source works; someone said some of the works in ZKM seems showing off what technology they are used. Actually, I agree a little with the part of showing off but I also think it is an experiment to see what the possibilities of art are, just like Doris said that.

For me, I think it is hard to compare because they are different.
ZKM is the exhibition of masterpieces and the cradle of media art;
but TM is just an annual festival with different theme and combining performance, workshop, and talks and so on.
But I think most of the works in ZKM is timeless then TM is more related to recent topics.

But anyway, two of these are also niceeeeeeeeee:] ZKM and TM also let me to wider my view.