In comparison between the two drivers, the 975D has a wood-like "thwack" sound when struck well while the 975J sounds more like a metal-like "ping" sound when struck. It was easier to tell where on the club face the ball was struck with the 975D although the sound and feel of the 975J seem to inspire more confidence.

The 975J, with its larger head and deeper face, provides more forgiveness than the 975D. We found that approximately 10 yards were sacrificed when not struck in the sweet spot. This was significantly less distance loss than similar off-center shots with the 975D.

Summary:
With the 975J, we think that Titleist has an improved product that will appeal to current 975D users as well as golfers looking for a traditional looking oversized driver with more than adequate forgiveness. We recommend that golfers making the switch from the 975D to the 975J demo several lofts and shafts to ensure that the proper club is chosen. We found that the 975J plays about 1 degree higher than the 975D. Golfers that get adequate distance, are good ball strikers, and prefer the wood-like sound of the 975D may not be impressed with the 975J. But golfers looking for additional forgiveness and increased distance off the tee should definitely consider this club. Additional information on Titleist and their entire product lineup can be found on their website at www.titleist.com.