I have found from experience that, all Bettas are different.
Agreed heavy Finnage Bettas require less water due to the weight of the fins.
Shortfin Males Although faster and More Agile do Prefer Bowls and Smaller Tanks.
Tooo Many Fish in a large Tank = More Patrolling and More Flaring = Higher Metabolic arate and Tus Shorter Life Span.
Bettas do Prefer Smaller Livinf Quarters within which there is Minimal to 0 Surface Movement.
Still Water Lets them Build their Nests and that was always an Indicator to there Temperament.
Also Meant Cleanliness was easier to Maintain.
Mr Grumps is Sulking ATM As he has No-one to Flare At apart from the Cat, So I might take a Trip to the Crowntail LFS @ the Weekend.