Board Thread:Theories and Speculation/@comment-45444155-20200806213256/@comment-46572764-20200808191853

In terms of the curse mark Orochimaru doesn't actually channel senjutsu he place a seal that gives the users a bootlegged but more controlable version of Juzos bloodline( Which makes it so that his body passively absorbs sage chakra, the downside being that he randomly turns in to a rampaging monster.) While with with sage mod you would need to learn to balance sage chakra with your own making it more powerful and controlable without the negative side effects you get after cursemark useage.