User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-33939194-20181202081721/@comment-1359322-20181203132819

If we're going by immature, Ise's team is more immature than Rias. Rias has been a King longer than Ise. Rias has been together with some of her major members longer than Ise has with him. Ise's team has Grayfia and Roygun. Rias has Crom and Strada. Both are stronger than the experienced member of Ise's team. We can argue that Ise can use Ddraig but we still don't know what kind of match their in, so too early to tell about the others. But overall, Rias' team is more mature than Ise's one.