Not sure that's the case since Inui led the match straight where he wanted, to replicate the same scenario that was setup when they were kids.They're roughly equal in Data, but Inui is better at gathering Data mid match and had high base stats (relative to the time) which let him make better use of the data.
The focus on physical abilities he learned from Ryoma and the perseverance he lwarned from Kaidou let him take it. Even then it was roughly 50/50
Also Sanada directly calls Yanagi out for letting his emotions take over which likely left him falling into Inui's pace.
There's no way his stats were better than Yanagi's. The latter is significantly ahead in NPoT. Inui's physicals were just THAT low at the start of PoT and the extra training regime just allowed him to catch up a bit.
Imo Inui just prepared himself better, put more effort and is a real singles player (whereas Yanagi leans more towards doubles).
Also Yanagi gets some sort of debuff whenever things don't go the way his past data dictated. He grows confident seeing the % of his victory increase, but the opposite applies as well (even going as far as giving up against Mitsuya when his odds reached 0, I don't see Inui ever doing that).
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Considering that Inui doesn'thave nearly as much data on Akaya as Yanagi, maybe the triangle applies there as well.
Yanagi got selected and Inui didn't so that doesn't really fit the reality. It was some sort of 2v1 that defeated Mitsuya (which is why Inui handed the badge to Yanagi). Also, Yanagi evolved his data even further and can get it from someone like Mouri, which was in theory impossible. This makes Ohmagari's feat against him even better, looking back.I always thought Renji is a better player than Inui. Since Renji is considered one of Rikkai's Big 3. While Inui is not even top 3 in Seigaku. (Tezuka, Ryoma, Fuji). And even became reserve at early part of story. Even though, it is slightly..... Lol
But anyways,
Nowadays, Inui is better than Yanagi.
Since that data Master in Genius 20 beat Yanagi easily. But Inui won against him, and earned the badge