the shane is an abrupt 3 stage and the others are subtle, blended, or otherwise "mellower 3 stage boards" if you will
if you are looking for the most agressive style of pop (not to be confused with "highest") then your search is Easily narrowed down to the shane, otherwise you can knock it out and choose from the bottom 3
of the lyman, b side and murray. i am going to GUESS that the murray has the most "mellowest" of 3 stage in your list. the b side and murray are both NEW shapes for this year and the lyman is a new graphic so you could get an older for cheaper
personally i have only ridden the lyman and liked it quite a lot. but like the other guys above, i prefer boards with more pronounced flex features. BUT, is that something YOU will like? maybe... or not.