I have the Compact in 40 with the 9mm and 357 barrel's but never liked the Shield .. was never comfortable for me to shoot even in 9 mm .. with the back straps the Compact has it is much more comfortable as it fits ones hand better .. and is fun to shoot ..

The Shield was never fun to shoot and I tried 3 different ones before going with the Compact .. I use the large back strap and that may be the reason I dislike the smaller gripped Shield my hand just doesn't fit it well ..