Tld is mainly longjacks and koreajacks whereas sendan life is mainly handquad and stamina. As for kuroneko idk. Assuming ur taling about opakyl's sendan life it should be harder than tld and kuroneko and especially kuroneko since they are the same chordjack type.
Edit: I just realized that ur probably talking about the chord life variant. I don't know much about it other than the fact that it's probably significantly easier than opakyl.
Edit 2: downloaded chord life ver and realized it's sr is from the ending spike. It would probably be around if not lower sr than lost dedicated and kuroneko is you removed hyper dense ending which is also why it's easier. If you want the true sendan life experience play
beatmapsets/1429175#mania/3005066. It takes the dumb hyper dense ending and makes it the entire map making the sr more accurate (Not saying u have to play opakyl tho).