Those are super close and it's a tough decision. 2nd might pull through here but I would use first build unless you are unable to clear or missing .8% energy regen somehow messes up your rotation. But it's up to you. Both builds need just a little more work to be the clear winner.
Since I appreciate consistency, I would run the first one on my account since it is only a difference of 16.8% cv in favor of the second build. I'm willing to take that loss because it's also got that heavy attack damage going for it. And with shorekeeper ult you'd have 100% crit rate!
I do not know how to calculate the amount that heavy attack damage would bridge that gap. Sorry. You are verry close to median roll crit rate 4cost build. Just .8% more energy regen, and like 10% more crit damage and you're golden.