Clones are genetically identical, so they are likely to look very similar, just like identical twins. But not all clones look exactly the same. Apart from genes dictating one's appearance, environmental factors and random gene expression are also highly influential.
In fact, the first cloned cat, named CC or Copy Cat, was quite different in appearance from her cloned mother. This is because genes in the female X chromosomes that express different colored fur can be randomly switched on or off in different individuals. Diet and exposure to different environments, life experiences, and diseases might also influence a cat's growth, appearance, and personality.