There is no difference between shemale and dickgirl. The latter sounds more palatable, so it started being used as the PC version, of sorts.
no one cares about how your specific classification of what the characters are, if i wanna make a story and give all my females giant cocks and balls and call them futa then they are futa. I could add another type of character, the same in everyway but give them all wings and call them shemales being that the wings would be the identifying difference. This is the same concepts as how in the west orcs are stereotypically green and have more human face, whereas in the west they commonly have more piglike heads and discoloured skin.
This is a fantasy story and futanari are technically fantasy creatures when used in this context, it is very clearly not a commentary on transsexuals or 'newhalfs'. Dont apply your broad stroke misinterpretations as fact.
(and as an fyi both shemale and dickgirl are terms that are not typically considered PC outside of fetish communities)
I know a guy irl who is a little over 4ft, his height classifies him a as a dwarf but hes not hundreds of years old nor does he have a puffy thick beard, he doesnt drink ale and he doesnt run around fighting with an axe so i guess hes not a dwarf right because of what i see in fantasy media right?
lets not confuse real and fantasy here especially when talking about a game where you can can be anally impregnated by a goblin and end up giving birth to a centaur via you one-way portal asshole whilst camping on a volcano after being fucked by a dark god whos dicks is twice the size of your body