Better control since 1 round lag vs 2.
And jab can cause bleeding if my memory serves, so would doing jabs be preferable? I can not recall if there was an edge, maybe brutal jab, that was necessary?
I recall something with jab was bugged where the damage or the timer, (I forget which) grew with every hit to the point of being ridiculous.
On par with it was a death sentence for almost any character.
I had a char testing it on one of my bards, and I think it was getting to the point of devastates for the bleeding damage.
I'm not sure how good the two cross edges were.
But I think with them cross would certainly be a viable tactic.
But otherwise, I'm thinking two jabs is just as good.