Harlequin and tort are completely different.
Emilybun, your two are harlequins and so is yours Georgie. Fifi is a tri colour (broken harlequin)
A black tort's genotype would be aaB-C-D-ee
A black harlequin's genotype would be A-B-C-D-ej-
You can put ej with a (Harlequin with self, non-agouti) but then you'll end up with shaded harlequins
Torts are pointed, an orange/fawn base colour, but the ears, tail, feet and nose are darker, and can be black, blue, chocolate or lilac. In baby rabbits you can hardly see the points, and whilst young they will be quite strong, as they get older the points get bigger but fade out more if that makes sense.
Tort is just the name for a colour. If does get confusing when tort in cats is what harlequin rabbits could look like. Harlequin can describe a colour (in a cross breed, rex or lop), or could mean the breed Harlequin, a rabbit of harlequin colour/markings weighing around 3kg
If the Harlequin colour has any white with it, it's usually called tri-coloured, like tri-dutch and tri-english. Tort with white dosen't have a fancy name, could be broken tort, tort dutch, tort english, charlie tort etc.
Oh and If there's harlequin markings, but no fawn/orange colour, it's called magpie, again a colour and a breed