Long time lurker, first time poster.

Anyone know if most knickers size accordingly to the same model of shorts? (ie, Pearl Attack Knicks and Attack Shorts)? Reason I'm asking, Specialized apparently doesn't. I wear a L in the BG Shorts, and an XL in the same Knickers. I can't find a bike shop within 3hrs that stocks anything other than Pearl shorts- no knickers or tights. If I'm a Large in the Attack Short, would the Large Knicker work?

Thanks, I appreciate it.