[Spain] Is worth the revolut 3.51% TAE interest-bearing account

The other day, I saw that Revolut is having a that promotion on their interest-bearing account, up until 25.000€ and until October (After that it would go down to a 2.27% TAE). I have a mortgage with an interest rate that is below the 2.5% and the interest-bearing account on Openbank is giving me a 1.50% (TIN, although I doubt there's difference with the TAE here, but that's why I'm asking here, lol). My emergency fund is less than 25k, my actual liquidity is slightly over that number, and I hav