I think cashing hearts first is superior.
If west has the long heart the contract is likely via
cashing ♠Q then diamonds. There will be a double squeeze when east has the diamonds and some chance otherwise.
When east has the heart length there is a chance of a
David a particular heart split when they are 3-3 is slightly more
likely than a particular 4-2 split (11 to 10 computed by
20C10/20C11) because there are more ways to distribute the remaining cards when they're 3-3 than 4-2. A 5-1 break has
a more unlikely ratio. (3 ...
Ace of clubs pitching the heart queen. King of heats followed by ace of spades and ace of hearts pitching a spade. Then club ruff
followed by king and a small spade ruffing.
Then club ruff followed by spade ruff.