Surface-wise speaking, ABS has a better grip with texture, PBT is hard, but less frictional - the difference is barely noticeable - I got to this conclusion by comparing SP's DSA PBT vs ABS keycaps (The texture disappears with usage, so PBT wins in the long run)
Surface-wise speaking, regular ABS is pretty good, whereas UV coated keycaps are slimy, the slime is much more slimier than a shined ABS keycap
Usage-wise speaking, making an ABS keycap shine is fun, it adds character, the double shot lives on
Second-hand-wise speaking, it's not fun buying a keycap set advertised as unused but in reality got shined and yellowed by someone else (light coloured keycaps also get discoloured by the way) - ABS gets pretty much soulbind to the user in a short amount of time
First-hand-wise speaking, If you're looking for a standard keycap set, PBT Cherry/OEM might work, there are some nice dye-sub PBT sets out there, yet for anything non-standard, PBT options are pretty limited (There is the Granite's, If you like the DSA profile)
So the Toxic set you want to buy might satisfy you, the surface will be great, most used keycaps will shine in 3-4 months, spacebar 1 month, depending on your expectations, switch type, the sound might satisfy you too - you should probably buy some single keycaps and see them for yourself, pretty much every themed single double-shot keycap is a SP DCS (eg:
http://keypop.net/products)
I was recently able to buy a GMK Dolch set that was used for 4 days, I'm more optimistic with the GMK, wondering whether I will be able to tell the difference of used/unused GMK's :)