Does anybody have any data or first-hand knowledge regarding differences in performance between the two?
10 years back or so, the 147 was blasted constantly for over-penetration in soft tissue and under-penetration in hard targets. Lack of expansion was a primary cause that seems to have been alleviated with modern bullet designs although the under-penetration of harder objects (heavy bone, windshields, ect.) is still questionable because of the lack of energy. In 9mm, a good 115-124 JHP is the way to go IMO. A lot of velocity is lost to gain 23 grains of bullet weight that doesn't give you much, if anything in return.