I love beyonce dont get me wrong however kelly is a
natural singer beyonce is a
trained singer
saw their videos when they were young even xtina is a natural compared to bey however beyonce worked her singing and trained so much xtina didnt ever some say she was too egoistic that she does think she doesnt need it but look at her voice now.
so in a nutshell kelly is more versatile than bey in terms of genres, she can sing anything and also kelly is a more powerful singer
bey is the greatest performer of this generation, however kelly clarkson is the top vocalist. just my opinion based on observations