Is there REALLY a difference between a sub and a hoagie?

After getting into a heated discussion with one of his co-workers, Dennis Malloy learned that there is more to the sub or hoagie debate than North and South Jersey.

Italian Grinder Sandwich Recipe - Belly Full

A guide to the best Italian sub sandwiches in Los Angeles - Los Angeles Times

What's the difference between a hoagie and a sub?

Burger vs. Sandwich: The Differences Between Two Meal Staples

What's the difference between a sub, hoagie, hero and grinder?

Hoagie vs. Sub: What's the Difference?

The Best Italian Hoagie - The Suburban Soapbox

The Difference Between Hoagies And Subs - Foods Guy

What's the difference between a sub sandwich and a hoagie? - Quora

Names for Sub Sandwiches Around America - Thrillist

Italian Cold Cut Sub Sandwich