THE headline of the article says silicon anodes cot more than graphite anodes but according to Coretecs CTO Ramez Elgammel he said recently in the interview
Coretecs silicon anode is not more expensive than graphite anodes
EV battery makers' silicon anode demand set for take-off
While more expensive, silicon anodes have better energy capacity and are quicker charging than graphite anodes

Ramez "..said Elgammal, though when Endurion technology does hit the market at scale, he noted it should have cost parity with graphite anodes while providing numerous other benefits."
....So in my opinion Coretecs silicon anode is better than this other company who has a battery deal with a one of the biggest battery manufacturers in Korea