PLS HELP ME! UCSB, UCI or UCD for Math

So I got into those three schools and I need to submit SIR by tomorrow.
UCSB - Stats and DS but I might change my major to Mathematical Science (IDK how it will be easy to do that tho)
UCD - Stats but I might change to Applied math
UCI - Math but concentrating in Applied math.

Does anyone have experience? And which school is best known for my major?
I heard UCD is both good in stats and math but ucsb has good math program too.
Honestly environment doesn’t matter I adapt very easily sooo

Is cost similar?

Changing major to math is described here:
https://www.math.ucsb.edu/undergrad/requirements
https://www.math.ucdavis.edu/undergrad/advising/faq/#major_declare
https://changeofmajor.uci.edu/school-of-physical-sciences/