How crucial is Composure for a good striker?

I currently have two players on my buying list, about the same price, 22M$,



the first one, Michael Hauke has great consistency, great important matches, versatility and injury proneness, but his composure is average...
the second, Israel Flores has similar technical attributes, but much better composure and bravery...

I believe the first one is more suited for AF role, but is composure going to be crucial?

The first player looks like the more well-rounded to me, he'll miss a few more chances than the second player but he will probably be able to add more to the team away from just purely scoring goals that the other guy will, considering his much better passing attribute.