Regarding Sewig address on my Nano Ledger, there are only two real type of addresses: bitcoin legacy and Sewig.
Actually there are more types of 'addresses' than legacy and se
gwi
t.
P2PKH (starting with 1..), P2SH (starting with 3.. (multisignature)), P2WSH nested in P2SH (nested segwit, starting with 3..) and bech32 ('native' segwit; startin with bc1..).
The nano s supports P2SH/P2WSH. Thats definetely better than P2PKH addresses but not as efficient as bech32.
I would not consider Bcash as a real bitcoin - there's nothing that Bcash does that bitcoin couldn't do better in the matter of times...
Bcash has nothing to do with BTC. Its just a fork. And to be exactly, a pretty bad one.
IMO bcash already is doomed to fail. 8mb blocks are not (and never will be) an answer to the scaling 'issue'.