Not a lot of knowledge but since no replies I'll put my 2 cents in.

I just booked an award ticket with DL on CI. Reason I took it was not going into China which I read way too many reports on connections. 2nd reason CI has some very positive reviews in a number of places for their Business. Other China Airlines not so much.

Of course it also helps that it is a Taiwan Airline rather then a Communist Chines Airline. Just saying!