This change is typically not uniform, and it is extremely difficult to generalise on the effects of taper, just to say that they are profound. Crash cymbals tend to have the most pronounced taper, with the faster crashes and the richer tones the most pronounced of all. The bell of a paperthin crash or a fast crash can be thicker than that of many ride cymbals. On the other hand, china cymbals tend to have little or no taper, as do the heavy to medium weights of splash cymbals.
Hi-hat and ride cymbals tend to have intermediate taper, with the washier ride cymbals having less than the pingier cymbals, but there are exceptions. A flat ride cymbal may have no taper at all and simply be a machined disk of uniform thickness, but a slight taper is more common.