Let’s!! Here are two useful guides. As a general rule, crank power meters are more accurate than pedals and others.
I have a Quarq, which is one of the most accurate out there, but also expensive. In fact, @dfriestedt and I have Quarqs on all of our bikes, and have had them for many years.We had Stages before and had some issues.
Curious as to what power meters others here use?