Originally Posted by Bad Luck

13WE and 13 WL calipers have the same piston size so there will be no change as long as nothing else changes in the brake system. Both calipers use the same rebuild kit. The brake pad backing plates for the two are different sizes, but the brake pad material is roughly the same foot print between the two. TBU 231mm vs. 199mm Pad Size

EDIT: To further elaborate why your pedal feels the way it does, your master cylinder is putting out the same volume but the brake caliper pistons are larger so they require more fluid to move the same distance as a smaller brake piston would. This results in a further brake pedal travel and less foot pedal effort. The textbook correct way to do this upgrade would be to get a larger master cylinder as well which some people have done, but it requires a lot of work to either find a compatible/bolt on master cylinder or make an entirely different one work by either changing the booster and/or deleting ABS.