There isn't additional room - the column of seats on the starboard side are offset slightly. The maps at seatguru will help. Both rows have standard pitch.
To be honest with you, if you want extra space go for one of the twins at the rear of WT - more leg space ahead of you next to the wall where the third seat is missing, and additional storage space down the side of your seat. Plus you'll get fed first.
If you're still interested in those rows, do not go for 39 HJK as there is no window here.