Hmm, I don't know if I like the translation. It is correct, but maybe a bit literal. What Shiki is getting at here is that Yanagi puts equal value on Shki and Kanata, not just that she thinks they are on the same level of potential. That exchange is exceptionally powerful because we just spent an entire event hyping up how much Yanagi values Kanata, basically more than her own life or aspirations. So putting Shiki on equal footing is what makes the moment so shocking.

Anyway, as always, this is one of the best moments in the game for how understated, yet surprising it was. Shiki's self-mocking smile as she just says something she considers ridiculous in jest, but Yanagi proving what one could already cleam from most of the event's build up... that she has been paying extra close attention to Shiki and really values her for who she is. Yanagi sees the hard worker who tries to please and actually cares, even if she's eccentric.
And Shiki for her part clearly puts Mion on a pedestal of her own, which makes her validation more powerful than of her usual squeeing fangirls.

There is really no other ship in HBR with such a mature atmosphere. One might bring up KuraMona, but honestly, they act more like awkward teenagers incapable of expressing themselves. Only YanaShiki really carry the adult vibe.