There must be a solid reason why some use it and some don't and I'd love to know what it is!
Was that a deliberate pun there SS ;D
LOL! No, that was entirely unintentional. ;D
I was just watching Sam's video and he was talking about how he had to add food colouring to his curries because when he didn't the customers complained that they didn't look or taste right. He pointed out that colouring doesn't affect the flavour so any difference was purely psychological.
My opinion of this Ghee, oil "difference" is that it's in the same vein, i.e. it's purely psychological and there is no difference (certainly not when I've used it anyhow), although he says he thinks the veg ghee is better.