Congrats! Both great schools.
It’s worth noting that Bowdoin’s per capital endowment is nearly DOUBLE the size of Brown’s endowment. And, there are no grad programs to fund at Bowdoin.
The result is an incredible amount of financial resources devoted exclusively to your undergrad experience-- facilities, housing, food, academic programs, activities etc. (It’s not surprising that Bowdoin made you a more generous offer-- this reflects its relative financial strength-- and this is a pattern that will follow in your undergrad experience).
Bowdoin is also a very chill place, with lots of well-rounded, but very smart, students and its location has a lot to offer.