looks very similar, but seems like the construction of the club itself differs quite a bit, especially with the 7-gram tungsten weights in the longer highers to get that higher launch! the new, wider grooves are pretty interesting too! nice review there on golf wrx!
callaway also introduced these irons through an episode on their Callaway Talks series, make sure to watch that too!
more photos: http://www.eighteenunderpar.com/callaway-apex-pro-irons/