Well, the PV ‘63 is bass-loaded and very punchy/thumpy but, to me, without an excessive loss in clarity although it may tend to become too grindy beyond a certain tone value setting.
I feel this pickup finds its natural habitat in the Motown sound department; its tone is spot-on for that kind of music (I can’t think of anything much better; maybe the Lollars/Arcane for a bit of added clarity but as @Texican stated we also can work on our preamps a little bit …).
The Epic ‘59 has got a slightly lower output and it’s noticeably less mid-scooped if compared to the PV ‘63; this makes it, in my opinion, a very good pickup for recording purposes in rock-blues-jazz musical contexts.
It can yield a defined barky sound without being too grindy or harsh; it’s a round and very even sounding unit; similar to SD SPB-1, I guess, but with a slightly higher output.
I noticed that, using a pickup cover which forces you to play behind the pickup location, this pickup produces a slightly nasal tone which may perfectly couple with that of an added single coil pickup in the bridge position for even more tonal possibilities.
Check out this tune I recorded with it, in which, although it wasn’t something I had planned from the start, this feature can be noticed:
Hope you may find this reply helpful for your purpose