I would say .02 tighter cause when it warms up the lash will get looser.
What happens to steel when it is heated?
It expands. Which will close the gap. So if the cam card calls for 0.016" hot then you add 0.002" to that number for a cold setting. Set the lash to 0.018".......
Aluminum heads are a different story. You would subtract 0.006" on the hot lash spec. If its an aluminum block & heads you would subtract 0.012"