Fleet formation is important too, right now as it stands the both fleets have horrible formations.
You try spending only five minutes putting down every ship from a list and putting them in perfect formations and fitting all of them in a screenshot that gives good estimations of numbers. The UEF simply has too many cruisers to easily display. I like stacked (vertical) formations, but then you couldn't see the ships clearly.
EDIT:
I mostly didn't put them in tactical formations at all. Especially the UEF side, which is so crowded with cruisers it's damn near impossible.
There wouldn't be a single GTVA fighter left with that number of Frigates. 
Assuming 12 fighters for Karunas, [fudged]12 fighters for Narayanas[/fudged], and 192 fighters for Solaris destroyers:
12(21) + 12(14) + 192(3) = 996 fighters in the UEF fleet (around 83 squadrons) (not stationed on an installation)
Assuming 96 fighters on an Orion, 150 for a Hecate, [megafudged] 200 for a Titan, 96 for a Raynor, and 12 for a Diomedes: [/megafudged]
96(1)+150(2)+200(1)+96(1)+12(9)= 800 fighters in the Sol Expeditionary Force arsenal (around 66 squadrons)
I get the impression that GTVA fighters are a hell of a lot cheaper in general though.