Both of those things depend on the character of the players in question and their influences.
That's a fair point, although from his first 5 overs you'd have to say that Ahmed was definitely feeling his nerves on debut. Settled down very promisingly since then and he's done what you expect a wrist spinner to do on a flat track by extracting more turn than the finger spinner.
Some crackers from Leach at the end there
Rehan has outbowled leach so far