There are some major differences between turkey hunting super early in the morning near where turkeys roost (sleep) compared to hunting them late in the morning. Early in the morning, you want to get as close as you can safely to where turkeys roost. When hunting the roost, having some prior scouting experience is very helpful. If you know exactly or close to where they are roosting, that will help your morning setup very much.
Early in the morning, toms are gobbling a lot while waking up. You’ll be hearing a lot of gobbling most likely if you know where turkeys roost. Once turkeys pitch down though, as the morning goes on, toms won’t be gobbling as frequently. Turkeys are spreading out and many times toms will then be out looking for hens. While calling late in the morning, one gobble could potentially be a lot more important than a lot of gobbles you might have heard while hunting close to the roost. It can be more common to bounce around spot to spot late in the morning in search of a tom that is being responsive. Overall, those are just a couple of the major differences between hunting the roost vs. late morning.