Enchanter question

[Soursop]

Other then max level of mobs able to charm, does Allure lvl 49 do anything additional, like keep them charmed longer, or breaks later rather then early compared to Cajoling Whispers at lvl 39? I notice mobs closer to your own lvl tend to break more. An example are the bok or guk knights at the king location. I have been using my lvl 39 charm and they tend to break often. Will allure help with this?