I know families with children at both schools. I would say pastoral care is more talked about at the Leys, but that doesn't necessarily mean it is better.
SPF have a past reputation as an academic hothouse but are now working on being a more caring and nurturing environment.
Our family has direct experience of the utterly dreadful pastoral care at the Leys foundation's main feeder school, St Faith's. Pastoral care is something they claim is important to them but we felt it was one of their major fails when we were there just under 5 years ago.
One thing you might factor in is that SPF is a very small site. They have a brand new state of the art sports facility but no grounds other then some the kids walk down to. Leys is better served in this area. Leys also has quite a broad curriculum including subjects like Food Tech (I think), SPF doesn't teach that. However, SPF is an academic school that is good on arts and sciences and I'd probably still choose it for a sensitive child.
Yr7 at Leys is very small. We had one child from our primary go there this academic year. There are only about 15 girls in total in the current yr 7. SPF is the opposite, more girls and slightly fewer boys in yr7. I have to be honest here, the girl from our primary is not esp happy at the Leys so far.
I know 4 boys who went to SPF this year, they do moan but mostly about the workload. My DC is at St Bede's and the workload is about the same.