Grant85
Head Pro
I agree it's A but may be more of a challenge at a place like Augusta when set up for the Masters. Could see some very big scores if a pro missed the green and short sided the amateur.
At a championship venue, A will be even further ahead. Augusta is 7,500 yards long. Most 18 handicappers will never even have played anywhere set up more than 7,000.
And remember the data collated is from scenarios where they are playing their own ball. If you put a team out of a Pro and an 18 handicapper to specifically try for the lowest score, then the pro can obviously play away from trouble and not take on crazy flags. Knowing that the am can't play a delicate flop shot and is still likely to 2 putt from 10 or 12 feet, even if he does hit a good shot.
Remember an 18 handicapper isn't shooting 18 over par on average, he is shooting that on a good day, around his 6,000 to 6,500 yard course.
A pro will have a stroke average of 69 or so around 7,500 yard venues.