It's paltry, poultry is chicken
I can recommend LT268, because i ride one and it's awesome. in 54 it weighed 1163g in matte, 1191g in gloss. It feels very stiff with Airwolf 36cm cockpit (allegedly full t1100).
Interestingly, they are releasing the 301 which is very similar in looks & geometry, but takes 38C (I have mixed feelings about that) and weighs <1kg. I assume it's just as stiff, but that's a question worth asking Alisa.
Crit means tight corners / breaking / acceleration, right? Are you sure you want a 1250g frame? The systemsix is meant to go fast in a straight line, it's not a crit bike, afaik.
If you want something more aero & more aggressive, i recently also built 2 winow FM368. I liked building them less, but my 2 friends riding them like them a lot.
The store you're looking at is called Ruichuangda Bicycle Store & their ratings are below average. I wouldnt order from them.