Haha, do you mean Unflavoured & Unsweetened? Can’t help but think back to our chat about Ray Holt, “Original No Flavour and Whole Wheat No Flavour” 
Vanilla - Vanilla flavoured Huel, light natural flavour, not to sweet but not bland.
Original - much more sweet, much less Vanillary, more oaty and a little malty. Original refers to it being the first flavour we had, not the flavour profile.
Unflavoured - as it says, no flavour, no sweetness apart from the whole ingredients.
That’s why we’ve got the explainer below the flavour!
@airiartev I think you’ve recapped the differences well with the quotes from other threads, but the only problem was the difficulty of matching Original but only using natural flavours.