What is the best option geometrie wise to choose.

I'm looking for a hard core racer!

I'm opting for a Ican Aero A9 or a Velobuild R-099/ R-168(2021 frame)

Prices:
Ican frame $855,-- shipping $120,-- total $ 975,--

Velobuild $ 479,-- shipping $ 141,-- total $ 620,--


looks like the Velobuild has a 90 degree angle stem so it is more upwards,but I don't think that there s a lot of difference between them exept the price 

Please let me know why the Ican or the Velobuild is the right option ?