My son scored 389 and I am most impressed with Dartford Grammar and Wilmington Grammar for Boys and we are unable to decide between the two. My son likes both as well. We live in Sidcup so are ooc.
Traditionally, DGS seems to rank higher than Wilmington, but primarily I believe this is due to the less selective intake by Wilmington as majority of their students are taken in by distance and not scores.
Any of your sons actually got selected for both but chose one school over the other? And why?