Both use a single BMS
1 BMS to control the entire battery, (you make your parallel groups)( then series the 16s) (2p)cells you created when you paralleled the cells can be written 2p16s or 16s2p
negative 2p-2p-2p-2p-2p-2p-2p-2p-2p-2p-2p-2p-2p-2p-2p-2p positive
later floyd
ps I prefer series...