I have personally collected subaeruginosa under coil pine in the nightcap ranges. Under the scope they had the classic clear bowling pin cystidia and were identical to collections from Canberra, perth and melbourne. Its got nothing to do with looking the same - studies demonstrate they are cross compatible and dna analysis also confirmed this. Regional variation in indole content is possible but im not talking opinion here im talking evidence. Johnson and buchanan suggested subaeruginosa was very close to cyanescens and recent dna evidence again supports that contention.