What’s the difference between a swede and a turnip??
Well, it depends where you come from and it is VERY confusing!!!
There are two distinctly different root vegetables called Brassica napus and Brassica rapa. Strictly speaking (and according to the RHS!) the rapa is an older variety (turnip) and the napus is a more recent cross between a cabbage and a turnip (Swedish turnip or swede).
And plenty of articles are devoted to these two:
‘Are neeps swedes or turnips?’ The Guardian
‘Turnips: the unsung hero of the vegetable world’ The Guardian
‘Rutabaga vs. Turnip: How to Tell the Difference Between These Yummy Vegetables’ Pure Wow
‘The difference between turnips and rutabagas’ The Spruce Eats