I think I'd have Neely ahead of Kerr -- having said that, would I have Neely in my personal 'Hall of Fame'? Probably not.
I think Neely could skate, pass, and play at 5-on-5 better than Kerr. Just in terms of 'aesthetics' (if such things are important), he could also score in more and different ways than Kerr.
I don't think Neely's 50-in-44 is what pushed him into the Hall. I don't even remember any big media about that when it happened. I think he just retired at the right time and had the right friends. In 2005, the Dead-puck era was the only thing in recent memory, but that era's players were still a long way from retirement -- someone like Neely appeared, relatively, a bit stronger of a player than he actually was, maybe.
The other thing is, when you look at 2nd-All Star teams, it's 4 for Neely, 1 for Kerr. In addition, Neely's playoff goal-scoring is more impressive than Kerr's: Kerr scored 40 goals in 81 games (39 in 73 with Philly), while Neely scored 57 in 93, which is really impressive.
One thing does surprise me, though, in Kerr's favor: Even though he's known as a power-play specialist (and was), it's actually Kerr who has the best and the second-best even-strength goals seasons between the two of them -- he scored 45 ES goals in 1984 and 33 in 1985.