Are you planning to (a) apply to all three, (b) choose two to apply to, or (c) apply to one of the above plus one or two other places?
My sister is in 12th grade and applying to seminary. From what she and I have heard, your assessment is pretty accurate. I think that Chemdas is also pretty academic, though- just based on the fact that so many girls who apply there also apply to BJJ. It’s definitely more yeshivish than the other two.
(Tehillas is definitely not an academic Verizon, though:))