Some food for thought, Nathan, from my experience living in both Irvine & LF.
Many company HQ's are in L.F. Similar type software engineering jobs as found in Irvine are also found in LF. So, yes, that's convenient if you're so lucky as to work there.
More freedom from neurotic parents in a pressure-cooker environment, obsessed with numbers.
As for El Toro, some of the kids I've talked to within the district feel El Toro is the best h.s. in the district. They enjoy the teachers and the programs and have transferred there from their school of residency. From what I hear, it's a well-rounded school with fine athletic programs, early college program, caring teachers.
Culture: If a person wants to be close to their church like Saddleback, Calvary Chapel FR, Rock Harbor or any of the protestant or "mega" churches in Orange County, they are mostly going to be south of Irvine with a short drive from BR (i.e. Saddleback). If BR ends up being similar to the surrounding area, you get more like-minded neighbors, familiar faces end up in your child's Sunday School class and in your fellowship.
Nathan, I don't know if you guys plan to have a SAHM in the family at any point but I find that role is more highly valued in certain areas than others. If Mrs. Nathan is one, and if BR is similar to LF, you will find more common ground with others there. In Irvine, I met a lot of nannies. Learn Spanish. They form their own little cliques. If not nanny, grandparents or daycare. A lot of moms & dads make career #1. You won't see their faces as much. Afterall, parents don't send their kids to an Ivy League school so they can care for their own children. I found it different in LF. (Not every family of course, but many of them.) More full time parents. You will see them personally. There are also more home-schoolers. Again, I think both of these are tied in with the paragraph above. If being focused on the family is important to you, and it is especially with a lot of Christian families in the area, give it some weight. We don't know who is moving into BR yet, do we? If it's like its neighbors to the east, it will have those benefits but a few minutes closer to the 5, a little more centrally-located.
Got to consider not just the house but the kind of neighborhood you want. If having a 99 Ranch nearby is Mission: Critical, Irvine is the place for you.