Interestingly, I could see the old Bitcoin adopting SegWit and potentially becoming even more popular than BTU afterwards, so it'll be interesting to see how it plays out.
you do know that segwit is using a new block design (a 2 room apartment not a 1 room apartment)
you do know that segwit is using a new tx design (the mother(witness/sig/proof of ownership) is moved to another room away from the child(txdata))
you do know that segwit is using a new validation method (the family social worker(node) has a new checklist, leaving the old checkist less than full)
segwit is the new coin. and existed as an altcoin in the elements project. and has totally rewrote bitcoin into something totally different.
dynamics is using native keys and same validation, its just allowing more tx's in (more families into the 1 room apartment by knocking a wall down to have a bigger room)