Between 16-35 and 24-70, which one you use more?
Ok I need to go into more details.
On my trip to Bali last July I brought my 12-24, 24-70 and 70-200.
24-70 used 95% of the time. Only time I used 70-200 was at one cultural show.
On my trip to London/Germany last September I didn't have a 16-35 yet.
I brought my 12-24 + 24-70 + 70-200.
70-200 never saw use at all. 12-24 only used twice.
On my next trip to France/Germany/Czech Republic last December I brought the same setup.
Once again, 24-70 saw the most use, everything else ended up underutilised.
On my next trip to Spain last June I brought 16-35 and 24-70.
Only time I craved my 70-200 was when I went to a Birds of Prey show. Even then I made do as the birds were flying in very close.
In regards to between 16-35 and 24-70, once again it all depended on what I was doing.
16-35 was used for Cathedrals, Palace interiors.
24-70 was used for everything else (family shots, panoramas etc).
So as the adage goes, a time and a place for everything. I don't know what type of photos you take, so ymmv.