I personally own both and the reason I kept both is I keep telling myself I'm going to bring the 24-105 for travels as a one lens option. However, once I start using the 24-70, I soon found the difference between the 2 is way more than I imagined. Till today, I still own both bit I've not touched my 24-105 since for anything whatsoever. I don't think I'll ever sacrifice what the 24-70 can give to use the 24-105 again
Ditto. Still have my 24-105, too...I've gone so far as to shoot product pics of it and dig out the original box, although I haven't actually listed it yet.
Ditto too, when you see the pictures of 24-70L II, you don't want to use 24-105 any more. It's scrap.
1DXmk2: 24L, 16-35L II, 24-70L II, 24-105L, 100L f2.8, 70-200L 2.8 II IS, 400 2.8 II IS, 85L f1.2, 2x600RT,- Sony: A7s2, A7R2, Batis 25, FE 35 f2.8, FE 16-35 f4, FE 24-70 f4, 24-70 f2.8GM, FD 28-135 cinelense, Metabones EF to Sony E adapter