No kids in the game any more. So current opinion via friends with kids at school plus staff I know.
Priorsfield is smaller, no prep school of its own to feed it, so has to work hard for its year 7 numbers. They've always offered a very high number of scholarships, if you google local prep school's senior school destinations, you always see the largest is the number of PF offers and scholarships. Not sure how much they're worth, usually 5-10% I think. The school itself must be feeling the effects of vat, NI and rates as their financials (always check school accounts online!) were always a little tighter, as you can see in their accounts. Not sure if that's going to feed through to less generous scholarships though. Academics not as high as other local schools, but appeals to girls for other good reasons.
Tormead don't seem to offer as many scholarships, and I've heard that this year is no different, not sure what they're worth. They have a very popular prep school though, which means they only need a smaller number of externals for yr7, and a employee I know there said their yr7 taster day and 11+ day was really busy. So they are clearly still v popular right now. TM more academic than PF, which won't suit every DD, plus city centre location, not fields or semi rural like PF or StCats. Apart from the standard couple of moaners (who would moan anywhere), always hear v good things from parents and girls.
St cats is the one you haven't mentioned. Academic, same as tormead, slightly more so , but tormead seems to be nibbling at its heels every year now. New head on the way , could be good, could be bad, who knows. Rolling fields in rural area, if that's your bag. Reputation for pastoral care not always their strong point - as per parent reports - not first hand, so don't take as gospel. Not sure what scholarships they are offering, but they tend to operate similar to tormead in this area.
If I was choosing right now I'd be looking for value for money: a good all round school, that is financially secure long-term, with the lowest fees to protect my wallet.
Good luck!