I've played both the Holy Diver and Juggernauts, but not in the same guitar, or even same type of guitar. I really liked both pickups. The Juggernaut is definitely more modern sounding, but it is very versatile. A guy I know has one in an ESP Eclipse, and I played around with it through a Mesa Boogie (can't remember the model). It has nice tight lows and can really handle high gain, but what really surprised me is how good it sounds clean. The Holy Diver, which was in a Super Strat, nails '70s and '80s hard rock and metal. It isn't as tight as the Juggernaut, but it is relatively tight. It is hard for me to directly compare them to one another because I never played them side by side, and I haven't played them through the same amps or in the same guitars as well. I really enjoyed both though. I'd probably lean towards the Holy Diver since it has enough top end to cut but can also fatten up a Super Strat, but I think the Juggernaut could be an interesting option to try in a Super Strat.
