Somerhill was our second choice and would also have involved a drive from TW. We have friends who are very happy there, with children going on to The Judd School, Tonbridge School, Sevenoaks School and TOGS. From what they share, experienced staff often join from strong London prep schools, having relocated with their own families.
Somerhill has a larger site with more facilities and remains a strong feeder to both grammar and independent schools, including good numbers to Tonbridge and Sevenoaks, two of the more selective day schools. Hilden Grange Schoolprobably has a slight academic edge, with more 11+ passes and pupils moving on to Tonbridge, often with scholarships, at 13. Somerhill stands out for facilities and co-curricular breadth. Its larger cohort allows for economies of scale, themed days, visiting speakers and authors at lower cost per child, while Hilden Grange offers more of a small, close-knit feel where everyone is well known.
Sporting strengths differ, Hilden Grange is particularly strong in athletics, while Somerhill may appeal more for swimming. Both schools are, in my view, stronger than the TW preps for families targeting selective 11+ or 13+ entry.
Somerhill has a new head starting in April, coming from a traditional academic prep in Windsor, so a consistent ethos is likely. They are also appointing a new Head of Pre-Prep as the current one moves to a headship elsewhere, which brings some change but also fresh energy. Some friends feel Somerhill suits girls especially well, and boys who are academic, sporty or passionate about a particular interest thrive, while quieter boys sometimes prefer the smaller environment of Hilden Grange.
Ultimately, both are excellent schools, and the right choice depends on the balance of academics, facilities and atmosphere that best suits your child. Visit both several times and do taster days at both.