uef’s better (having a) lab gives more flexibility in early t1 stage since thaam and striker differences are quite marginal in the grand scheme of things. You won’t push 3 thaams into 3 strikers aggressively. But thaam + zthuee + sera ACU are stronger on late t1.
Aeon early t1 flare is op as is spirit, to the point they can deal with tank groups smaller than 4 using just those units. Which is basically what I define as early t1 stage.
Early t1 is stuff like first bomber mostly and killing expansion engies, late t1 is when you have the capacity to scout aggression before it happens, so like 8-10 ints roughly with some radars/scout planes existing.
Late t1 strength is mainly governed by t1 arty drops since IMO most bombers are equally decent at cancer attack moving around the map/killing pgens and in early t1 sera and aeon are strictly superior in killing engies with sera having the better 1st bomber for it.