Do you mean soya as in soya beans or ready made meat-substitute out of soya? Because they are usually at least double as expensive than the real meat version here.
I am not sure these links work, as it's from a German online supermarket and you need to enter your post code to proceed, but here is an example:
Vegetarian Cordon Blue: 3,25€ für 200g - So 1,63€ for 100g
https://www.allyouneedfresh.de/info/rue ... ikel=52092
Real Meat Cordon Blue: 2,59€ for 500g - So 0.51€ for 100g
https://www.allyouneedfresh.de/info/rue ... ikel=52092
So the vegetarian version costs more than 3x (!) as much. Crazy, isn't it? It's mostly made out of wheat and soya and I am quite certain that shuldn't cost 3x as much as a pig, but they are taking real advantage of the vegetarian/vegan boom here.
I don't know what Quorn is. My dictionary came up with nothing, so assume it's some kind of brand we don't have here?