Feed Flute Cave and Seven Star Cave in Guilin

hello, I have a probably stupid question, I find through internet two so called"fatastic" caves in Guilin, Reed Flute Cave and the Seven Star Cave and they said they'er both very popular. But what the difference between the two if any? and which one should I visit or do I need to pick both?

not need to visit two. you won't feel much difference beween the two cave.The seven star cave is a little bit longer while the reed flute is somewhat more attractive and popular but it probably too touristy for some people's taste. The seven star cave, however is less tourists beaten.