Allow me to first correct a typo in an earlier post. The K15 heads are much bigger then the G15 heads. Not much difference in face height though.
I got some range time in today with both and the G15's work better for me. I felt they were easier to get up in the air and a bit straighter. I would say distance is equal. I think the K15's could be more forgiving for a golfer that does not hit the ball reasonably close to the center of the face. I was a bit put off by the large size of the K's especially by the 5 wood.
Next up and the final decision. G25 3 and 5 versus G15 3 and 5. The G25's will be a bit bigger (volume) then the G15's but smaller then the K15's.
G15 3 wood 154cc, 5 wood 147cc.
G25 3 wood 165cc, 155cc.
K15 3 wood 199cc, 192cc.
G 3 wood 169cc, 5 wood 161cc.
G400 3 wood 181cc, 5 wood 169cc.
I think the above specs are correct. Took some hunting to find them.
For those of us that like hybrids (I have 3-4-5), I think we have grown use to a smaller "wood looking" head so we no longer like larger looking fairway woods....or is this just me mind screwing myself........LOL