Identifing Difference Between Two Different Bklt Stamps

Scott 1361 and 1362, flag and building stamps have two scott additional numbers, 1361as, 1361ds, 1362as and 1362bs. My question is how do I identify them when both having the same perforation? Both being booklet stamps but with 10 or 25 stamps in the booklets. Hope you can understand this.

I don't have the Unitrade catalog handy at the moment, but, single booklet stamps with a straight edge are given catalog numbers with the "s" suffix.

For example, 1361as is a single with straight edge, from 1361a (BP10) or 1361b (BP25). Those singles without straight edges are 1361, whether they came from a sheet or the BP25 (all stamps from the BP10 have a straight edge).

Robert

Edit: Rewrote sentence after consulting the Unitrade catalog, and added example.

I believe the major difference is: #1361 is 22 x 26 mm (larger) and #1362 is 20 x 24 mm (smaller).