It's really difficult to know which is better, but in general knowing aged accounts are typically better.
The reason why is because often where they have been in the game for quite some time it's not always looked at right away, as said above if it's a fresh account and is randomly knocking out all the good stuff it's going to sound a bit weird. That being said trial and error with any scripts and bot accounts work a charm.
What you need to remember is you can be caught two ways, via manual botting checks and players reporting you. If you're not in a common location then option 2 is