What real difference does the lsa on a cam make?

GTMOPAR: Subscribed. I'm having issues with which roller cam to run on my 90 5.9 roller as well. All this info is really good.
I can tell you,a mild Magnum 360,with a [email protected],114 lobe center,284 advertised,.491 lift(1.6 rockers) IS MILD. Sounds like a stock 340 cam.800 in drive,21" of vacuum. Too mild,for my tastes.Lotsa torque.