Moreso if you get the -1 AP on ranged weapons talent.
If you really want to go into detail about it, number your AP, the AP cost of using your weapon for an attack, the AP of your most used skills, and see which split gives you the best use of your AP.
If you gain more in speed, then the balance might shift, favouring the other weapon. So it might not be a bad idea to keep both the best bow and crossbow you've found around.
