what is different that change start address and use WSTRB signal for transfer

I think there are two method for transfer with unaligned address.

I want to check my knowledge is correct or incorrect

and if incorrect, please teach me.

1. Use WSTRB

: for use this method, start address is base address

e.g> if do not transfer 0

start address = 0

WSTRB = 1

2. Change start address

: for use this method, set start address and do not use WSROB

e.g> if do not transfer address 0

start address = 1

WSTRB = 0

Is it correct?

and can you explain how to different use to method (please use some example)

thank you