All of these docs are excellent; you should do well with either.
Bernstein is a very smart guy. He is more conservative but does meticulous work. He does not do mega sessions per se but his outcomes, imho, are excellent, age appropriate, and natural looking.
H&W also are top notch and go for mega sessions. Lots of nice work by these two. Remember, if this works for you it is great but if not you burned a lit of grafts.
Why not consult with both?