The comparative form of "subtle" is "subtler" and the superlative form is "subtlest."

comparative -- more sensitive

superlative -- most sensitive

Stone crab no flavor to me but dungeness has great fllavor but subtler than king crab

That sounds like "Ars Subtilior" (Latin for 'subtler art'), a musical style popularized in late 14th century France.

The Peloponnesian war resulted from conflict between the democratic Athens and oligarchic Sparta. This war wrought subtler changes to the Greek society.