Board Thread:Theories and Speculation/@comment-45444155-20200728155230/@comment-32685487-20200729224052

Kabuto is using Sage Transformation and Sage Mode together, while it seems Orochimaru could only get to flat out Sage Mode(which he could not maintain thanks to his host body). Kabuto basically has a perfect Sage Mode that won't run out and his body has no problems with it. It was never stated anywhere that Orochimaru integrated Jugo's enzymes and dna into himself before the 4th War so Orochimaru did not have Sage Transformation.