UCSD transfer to CCE

Hi,
I got accepted to UCSD today, but not to my first choice major which is “Computer science and Engineering”
I instead got my second choice major “Physics with specialization in Astrophysics”
Now, I REALLY want computer engineering, so I was wondering if transferring is possible, how hard is it and how is it done.
I also got accepted into UC Davis, should I go to Davis since I got Computer engineering?
What do you guys think, and how competitive is CCE at UCSD

Thanks in advance

http://www.ece.ucsd.edu/undergraduate/capped-major-status

My advice is accept the direct admit school.