The reason most people use liquid waxes is for convenience. They are somewhat easier to apply by hand and with a buffer. In terms of overall appearance, I would not say that there is much a difference. I prefer paste waxes to liquids, as I feel that I can get more applications out of a can of wax over a bottle of liquid. Also, there is nothing like the feeling of holding a solid can of paste wax and walking around your vehicle as you apply it. It is what you could call "old school", that's for sure.