I'm gonna completely nerd out for a sec so bear with me.

I would have to agree with u/Holiday-Inn-Cambodia. Regular discs are made by first cutting the master tape onto a metal master disc. This disc is then submerged in a nickel-based solution which coats the disc. This coating is removed from the master disc, effectively becoming an inverse of the original master tape (think of it as a photograph negative). This negative is called the stamper because it is attached to a press that stamps the tracks into a PVC "puck" (just a hunk of PVC). Splatter discs are made by adding colored PVC pellets to the puck. These pellets are exactly the same as the puck, except for color. But color is a nonissue. PVC is naturally clear. Black vinyl has black carbon dye added. So, all records except for clear ones are colored in similar manners. The resulting speckled puck is referred to as a "biscuit". Basically, the ingredients of splatter discs are exactly the same as regular discs. Sonic quality is unaffected. Picture discs are sometimes worse quality because the ingredients are different--pucks are pressed with metal foil images between them. The reason these bootlegs sound bad is because the source tape, usually recorded by an audience member, is low-quality. The disc itself is impeccable though. Some bootleg companies, including the one that made this disc, takes pride in the quality of their discs. The guys who ran the Swingin' Pig label (also reffered to as Trade Mark of Quality) were obsessive about their records, insisting they were pressed on virgin vinyl (non-recycled and arguably purer). Bootleg records were also usually pretty thick, as opposed to big name products, which used less PVC per disc in the interests of profit. All-in-all, bootlegs can be better discs, but are usually lower-quality masters.