BHA is the alky needle. It is typically used with a .110" main nozzle.
DID is a very thinned out needle for for use with .100" main nozzle and gas primarily - but you can make any of these needles work with the right main nozzle.
FWIW, I prefer to use the BGB on alcohol and ream the main nozzle to .104-.108" depending on the application.