Depends on how souls actually work at a quantum level, some people, like NDGT, believe they don’t exist.
but if they do then there could be replicant drift from one generation to the next.
Hell honestly, you might not need something as profound as a soul to observe a replicant drift over time throughout a lineage. No matter how identical they are, 2 clones will have different life experiences ranging from things as minor as seeing events from 2 physically different locations in time or space up to something as major as experiencing important life events differently. I don’t believe it’s possible to stay the exact same when there’s so many differences in one life lived to another.
I bet xt prime wouldn’t even recognize himself in xt 24.