So, as usual, it depends. I have Zeiss bino rangefinders. Great glass, good for finding your target, then quickly pushing a button and checking range. Depending on how far away and how small the target, you may need to steady the binos on something, like a bag or tree. I've found tree branches and the like often result in erroneous measurements, so you need to check multiple times, just to verify the correct distance, both in front of and behind the intended target.
If you are not in a rush and have plenty of time, separate standalone binoculars and a monocular rangefinder may be superior, as you would presumably have a higher quality rangefinder that has a smaller beam and does a better job ignoring brush or branches that may be in the way. The downside is that the little monocular rangefinders are not as good for observing, so most use binoculars for glassing, then switch to the rangefinder, which can take considerably more time.
I'm happy with my Zeiss binoculars, but I sometimes think about adding a small, dedicated rangefinder to the bag, just so I can verify the numbers I am seeing from the Zeiss.