Blue light is a higher energy potential, thus a stronger source of light per photon emission. Blue light also has a pretty high optical damage, and the diodes you've picked are classed with laser diodes in Risk Group 2.

Spec sheets are misleading. Why are they trying to measure output in terms of lumens when the lumen is specifically set at 550-555nm? You're not going to measure 630nm or 660nm light as if it were 550-555nm.
Input power/output power. 1 w input, 450mw output. Blue diodes (sometimes) have the proper radiometric output listed, but those are few and far between.