Ok let's not get off into "what if" land.
We're not changing durations, etc.
Sure "overlap", but how? In which manner is it affecting the engine? What is actually happening besides having both valves open at the same time for a longer period of time?
These 2 chunks of bumpy cast iron are lying on the table..... what's the difference between them?
What is the difference between these two cams, timing wise,
and then let's talk how it affects the engine.
Hippie brought it up, Why do fuelies have a larger overlap? What you said is sort of correct..... they do, but why? Why does the "almighty computer" have to have a wider LSA..... can't they just tune it differently? mmmmm?
It is as obvious as the nose on your face. Sometimes it is hard to see the forest for the trees !