I think you will find few people who actually have experience at both schools. But I also believe that whichever school you choose you'll be at a great school. You probably are already reaching out to folks at the schools directly, but I would strongly recommend that you do that. You can contact the Hearst PTA president directly at
president1@hearstes.org if you want to chat with her. And you can easily google (I won't post her personal contact info) Eaton's HSA President's email.
I will say that we have been extremely happy at Hearst. We love how small it is, what a close knit community it has, and how great our experiences have been with the teachers and staff. No school is perfect, but it has been a wonderful experience for us. That said, I know quite a number of folks at Eaton and other than being upset about their feeder switch to Hardy (which is not the bad thing as folks make it out to be, but I understand how they feel) these people are very happy too.