I would say pick which ever one you want to work for..or work on modified and then after a few weeks switch.
I am VERY familiar with the program. My biggest piece of advice to you is make sure you do an equivalent amount of back exercise. I did this program about a year and a half ago, and didn't finish because by about week 6, my pecs and delts were constricting my brachial nerve and the blood supply to my arm and I was having pins and needles at first in my left arm, then it gradually started to go numb. 6 weeks of physio-therapy fixed that right up.
But boy,could I do push ups!
The condition is called
thoracic outlet syndrome and it's no fun. It's also pretty rare to be caused by exercise, but it's still a good idea to work opposing muscle groups.
Mel