That's interesting as the indecision at our Prep isn't between those two at all. Ours is around pure geography and most are torn between PF and StCats to due ease of transport. Some have forgone StCats and picked Tormead as its just as academic but suits a sibling drop of off for RGS.
I guess it also depends on where you are.
The choice between academic success and nurturing/creative is still an odd one. All the schools on the guildford circuit are 'creative' and pretty much all of them have a reputation for pastoral care, wellbeing, nurturing etc. E.G. Hasnt that been Tormead'S USP for decades now, education in a caring a supportive environment?
We're choosing Stcats (over PR and STs) due to its academic credentials and geography, tormead doesn't feature for us due to my work/school run. If you daughter has been offered a place at a more academic school, I certainly don't know why you wouldn't take it, they wouldn't offer if they didn't think DD could survive, and they certainly won't be lacking in creativity either.
The choice for us is simple, if your DD can get into an academic school, there's no choice. If you worried about your DDs ability to do well then go with the lesser academic credentials.
But we won't ve selling our DD short and know she'll do well, plus be very creative and looked after at the same time.
Smoke an mirrors around this whole 'creative/nurturing' thing is mad. It's just another way if saying 'we ain't that good at getting decent results, so we've made ourselves up another usp' (which other schools have anyway).