403b consolidation question: TIAA vs Vanguard

I'm 27 and starting to try to take my finances more seriously. I've worked at 2 non-profits and have 2 403b accounts.

1. 403b through vanguard - previous employer and I no longer add to this account

2. 403b through TIAA - current employer and a monthly deduction from my paycheck

Would it make sense to consolidate, adding Vanguard account money to my TIAA account? I tried to look into the pros and cons of both and got lost.

I also am likely going back to grad school in the next year, at which point I would not be actively adding to either account and could consolidate into Vanguard if that is a better choice.

Any help is appreciate and happy to answer follow-up questions!