Well, I may be being a bit ignorant myself, as ECB is the only one I'm aware of too. Could be other types, I'm not sure. Justdoes sound very high for an ECB tracker
That looks like about a reduction of 0.5% rather than 1%. Maybe your repayments will fall again next month as this only takes the first ECB reduction into account? If I plug in 5.521% APR on €60,000 over 294 months, I get a repayment of €367.92 per month, vs €334.82 per month for a rate of 4.521% or €351.20 for 5.021%. There's some scope for things being a few cents out here and there as interest accrues daily and rate changes won't typically occur on the repayment and so on.