What is the difference between Chanalyzer 6 vs inSSIDer

Hello all,

Looking for neighboring AP’s and channel congestion which app is better suitable Chanalyzer 6 or inSSiDer?
With Chanalyzer 6 license I am able to see neighboring number of AP’s and per channel congestions, meanwhile inSSIDer asking for “Metageek Plus” in oder to see AP Utilization, can someone explain differences ?