I did tests on https://vytal.io/scan and Vytal is the only extension that gives the same result on User Agent string. Other extensions like Random User-Agent (Switcher), Browser Boost gives different result on Top window&Frame, and Web worker, example: tarampampam/random-user-agent#624.
I know this is an alternative to Vytal, that's why I hope it has User Agent changer feature like Vytal does.