One of the advantages of hand held meters is that you only have to learn one meter and the guessing goes away.
To use an analogy think of it this way.
If you have one clock you know the time, if you have two and they disagree, there is doubt as to which to believe.
I have an F100, several N90s's, an FM, an RB with a metered prism, the "i" apps, and a Sekonic L358.
Make no mistake, all are capable of good readings with proper understanding.
But by a significant margin, the Sekonic incident meter is the most reliable at producing good negatives. In fact almost I find it almost infallible in my little world. I literally can't remember a single exposure failure when I have used it in the last few years.