is the sound of vinyl due to the physical process of the turntable?

It is very simple for laymen playing records From cereal boxes. Records provide a continuous signal. Any digital source, even if “oversampled” still is not continuous- it has individual bits of information. Remastered records are usually better because the original tapes are typically half speed mastered so it can be cleaned up. Also they are usually made on better vinyl and pressed better. 45s are even better Because you’re getting the information delivered at even higher rates and since they take up less space on the record, the tone arm sits closer to tangent to the record and spends less time at a reduced angle.

The records on the cereal boxes and most importantly inside MAD Magazines ("She Got a Nose Job" and "It's a Gas" were 2 childhood favorites may find them on YouTube) are thin flexible vinyl (PVC). They are made by Eva-Tone Corp. in Illinois and now also FL.  I was at the factory in the 70's. Had them stamp clear Fresnel lenses (similar to record grooves- we furnished the stamping masters) in continuous rolls then cut into squares on same production line as the records. We used them in our Psychedelic/Disco color organ sound to light boxes, made for folks like Spencer Gifts, Radio Shack, etc.  Stayin' Alive in the good old days.

My Captain Crunch version of the "Little Red Fire Engine" didn't sound to shabby.

If a vinyl record sits on a platter and a cd sits on a small spindle how do you keep the cd from wobbling? If I reverse the process and make a spinning cd size platter and have the laser read the cd from the top by eliminating the wobble could I improve the sound quality? When i play a digital download there is no physical cd player so no wobble and the sound is no better than a cd playing?

Hi,
they are spinning at higher speeds and they are clamped.
Some players even have weight clamps.
+1 for more info being on the disc.