Yes the cockpit covers and the sprayskirt sizes are the same for each model of kayak. 

If you need a 2 XL size for your cockpit cover then you need the 2 XL for the sprayskirt size.

Beluga Skirts are here:  https://boutiqueborealdesign.com/collections/sprayskirts/products/beluga-eco-sprayskirt?variant=43089522557186

Beluga Cockpit Covers are here:  https://boutiqueborealdesign.com/collections/cockpit-covers/products/beluga-nylon-cockpit-cover?variant=

Hope this helps,