Hi @Lisen12 ! My son is a new 10th grader at St. George’s this year, and he absolutely loves it. I can’t compare it to Portsmouth Abbey because I know very little about the school and don’t know anyone who goes there, so I’m sorry that I can’t help you with a direct comparison. You may be able to compare SSAT scores & SAT/ACT scores?
But as far as SG goes, we have been very impressed by the academic focus. It is a fairly traditional prep school with a rigorous academic program, small classes and committed faculty. Athletics are important, but the arts are also very strong & quite popular at SG. In terms of “wealthy families” yes, there are some at SG and in fact you will find them everywhere. Being from NYC maybe I have a skewed view of things, but if you asked me where most of the “wealthy families” send their kids to boarding school, SG would be nowhere near the top of that list 
What we love about the school is that the kids are happy. They take their academics seriously, but are not stressed out wrecks. They participate in sports, but it’s not a “jock culture”. They have wonderful, fun traditions as well as a forward-thinking commitment to new teaching methods and research. The new Head of School is fantastic (she just started this fall) and has already had a very positive impact.
It’s a beautiful part of the world for sure, and the proximity to Newport and the beach is a huge bonus. St. George’s makes the most of their location and I would imagine that Portsmouth Abbey does the same. Please feel free to ask more specific questions, and I’ll try to answer them for you!