Coach May - While I certainly agree that the Stalker reads lower AND more accurately, I absolutely have seen the Stalker read higher than a guy right next to it with a Jugs - not once, but numerous times. You are right that far more times the Jugs will read higher, but again, I have not seen 3-4 mph, more like 1-2 mph. And I've sat next to multiple Stalkers all reading +/- 1-2 mph on the same pitch as well.
I'm sort of embarrassed to even write this post because it really doesn't matter what I have to say - its just what I've seen.
In any case, the Stalker is the gun nearly all scouts are using and the one that will be quoted in a scouting report.
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"Pitching is the art of instilling fear," Sandy Koufax.