I think my first comparison might be misleading. That one is comparing Keyan who has hlc to a vanilla delta defender. That's not a fair comparison as it turns out +6 points in favour of Keyan turns out pretty good for him.
The comparison below that is where the defender shines. If they're both stressed, yes Keyan wins, but that's sort of the point of his ability. Assuming the defender gets to focus, keyan loses at all ranges.
Ok so what I get from this is, vanilla Keyan vs delta defender loses. Keyan vs any other defender wins since he gets bonus points for upgrades like adv sensors? Honestly tho on paper that's what the math might say but on the table Keyan still outmaneuvers defenders. I think vanilla Keyan vs a vanilla delta would be a lot closer than the math says.