Maybe I should have just asked "Ultgera di2 or DA mechanical"....but anyway....
ENDURACE CF 9.0 Di2: http://goo.gl/jPbGS2
ENDURACE CF 9.0 SL: http://goo.gl/CExEjS
Both identical except one has di2 and the other mechanical DA: which one would you go for?
Also, it should be added that if I went for the di2 I would instantly add a DA 9000 crankset