rejay14 wrote in post #18888807
I have both a 1DXII and 5DIV. I use the 5D a lot at weddings (ceremony) because of the superb silent mode. I can creep around the church and no one pays me any attention. My question is this: I don't find a whole lot of difference between the two bodies, regardless of photo-situations. Does anyone else see a difference? My photos are "croppable" with both bodies.
The big differences that have affected how I shoot (bird) when compared to the 5D4:
- spot metering linked to AF point. This is huge. In fact, this is the one feature that I feel has substantially improved my keeper rate w/ the 1DX2 over any previous Canon body. It's a travesty that Canon only reserves this for the 1-series. I also shoot w/ the EOS R, and despite the WYSIWYG advantage of the EVF, the shots from the 1DX2 come out metered exactly how I'd do it in the R.
- 14 fps is the other major thing that has positively impacted my keeper rate, as it makes capturing the perfect pose on a flitting, jittery bird a ton more easy.
- improved AF. The differences are subtle, but definitely noticeable. The 1 feels a little more immediate and rock solid when locked on. I don't get as many missed focus frames in a burst as I used to.
- high ISO advantage: ~.75 to 1 stop of noise. Not as big of a deal as the previous items, but I'll take every stop I can get 
One of the first things I did when I got the 1DX2 was to compare side-by-side shots in order to see if the MP difference was noticeable for bird fine feather detail. In the end, it wasn't all that big of a difference, and like you said, both bodies produce crop-able images.
The 5D4 is a stellar camera. If I wasn't primarily shooting birds, without a doubt it's the body I'd still own. Emphasis added because unless you're in need of more FPS and slightly improved AF, I feel that the 5D4 is the better camera.