No I'm just saying from the two other commenters. Instead of answering the question they just referenced things that had nothing to do with cubing. And didn't even say their personal preference when the question was why do YOU pefer. That a why I started the sentence the way I did. ✌
To answer you question more politely and later than the rest. Some people like the fluidity that the moyu ones brings and the fastness. The bell has more control and that's probably why people choose it over the moyu one.