I heard someone mention that when flashing it via ADB you don't get the Modules that come with the Kernel. Which I don't know if that was BS or not, cause as I stated, after trying it both ways, I didn't notice any features taken away i.e. flashed bricked kernel via ADB and then restored stock kernel and then flashed bricked via TWRP, and I was able to activate DT2W/S2W regardless of the method of flashing, as well as OC capabilities, Fast Charge, etc etc.
Just been curious about this for awhile, and there doesn't seem to be much discussion about it, so was unable to find an answer. Dev's always seem to give you the option to download a boot.img or .zip file, and wasn't sure if htat was just due to giving peopel the choice of preferred flashing method, or because of inherit benefits between the two.