I tend to agree with you that valve events are more important than the durations/center/LSA values. But people find those less cumbersome to deal with.
As for your cam, I don't doubt that it pulls hard to 6800 and is no slouch getting there. Wider LSA smooths a torque curve out across a wider RPM range. Narrow the LSA on your cam to 110 and the engine would most likely make higher MAX HP, but would have either less torque at the top, less torque at the bottom, or both. Personally, I prefer a 112 & 114 over 110 LSA for street applications for this very reason.
From what I've learned, LSA is a machine parameter and marketing gimick. If every company stoped advertising LSA, you would look at camshafts in a different way. The right way IMO.
Try this, look at the timing and duration events between the two cams and not the LSA. What is really going on causing the change in power production?
But in the end, like you, I'm just starting to learn and it's hard not looking at the number. I just try to ignore it now and I've really started to see what's going on with the airflow and how it ties into injector timing.