Engines with lack bottom end power?

273 said
why would the 300hp be ok with stock stall and highway gears and the 380hp needs more gear and stall, why I have to cruise in 2nd around town with my 380hp crate, most would say low end torque but since they have similar power down low lead me to believe it ain't a torque/power issue but a cam spec issue.

It's not a matter of needing the higher stall and gear for the 380hp. It's that to make use of the power available, having them makes it accessible. If you can't get anymore than the 300hp out of the engine until you're already committing a felony, some of the value in that extra 80hp is likely diminished.
High output builds want RPM. A higher stall and gearing lets the engine operate where it's making that power.
Or to answer your question with a question: why buy the 380hp engine and never rev it past the point of equality of the 300hp build? Which is effectively what would happen with stock gears/tirese/converter with the 380hp engine.