Slo_crx1

Here's a few compressor maps...you can compare them for yourself and see which one's are larger.
http://www.graphics.cornell.edu/~v/compressormaps/

Exactly. Depending on the trim T3, you can actually have a 14b that is considered "larger" due to the cfm flowed compared to a t3 40 trim. FYI, you can get 430 cfm out of a 14b before it starts to really blow just hot air, and is almost equivelent to a 50 trim t3.