I have never noticed any difference on my connection - maybe because no one can actually see my OZ hotspot!
Just recently I have been having an issue with one particular website - refusing to load, but if I connect to my OZ hotspot it is fine. So I have been using that quite a lot and no one else here has seen any impact.
What I have noticed and will try again later is that the total upload speed may be greater than my capped speed - it could be an oddity of measuring so managed tests are needed.
M H C
taurus excreta cerebrum vincit