you are confused about a couple of things here, first of all ETH, BCH, BSV are all in the same category of crappy altcoins and with decreasing size. and their existence barely has any effects on bitcoin price or the overall market movements.
secondly BSV didn't appear recently. this shitcoin started a while ago and it is only in war with another shitcoin called BCH and they both work with pump and dumps.
BSV is old tech. I used it once, it took more than 24 hours to complete the transaction, paying the maximum fee. It was during that chinese run on BSV, their network was at maximum capacity. I read back then they only have one mining pool.
Its like using bitcoin without Segwit. If bitcoin is already slow with Segwit (1 hour to complete a transaction, paying maximum fee), BSV is even slower.
BSV is the exact technology as bitcoin since it is a copy of bitcoin. its transaction speed is also the same exact speed as bitcoin since everything is without any change.
as for SegWit, both BCH and BSV already have a large portion of the Segregated Witness soft-fork implemented, it is just not called SegWit and since they were both product of a "hard fork" they never needed the backward compatibility part where signatures are moved to a different field in transactions called "witness". otherwise they use the same transaction hash digest preparation as version 0 witness program and BCH even has the Bech32 witness address encoding implemented.
that is the absurdity of these shitcoins! they fooled a lot of newbies back in 2017 that SegWit is bad, you'll lose money if you use it, spread the "anyone_can_spend" FUD, claimed it adds bad complexity,... all the while their shitcoin was the exact copy of bitcoin that had almost all of SegWit in it!