I don’t really agree. Stef FH cannot really function as a scorching sledgehammer (think Delpo, Fed or Sampras) because he cannot hit flat missiles despite having an Eastern FH. Plus, his FH is too wristy, hence lots of shanking. I mean, he has an Eastern FH but doesn’t have its greatest strength.Stef possibly has the best FH in the circuit (bar Nadal), but he has to protect his BH so much that it does not shine as much as it could.
OTOH, Sinner FH is vulnerable if his feet are not planted.