i have no idea how it will go as i usually always pay low fees till 2 days ago and never clicked static or mempool i have always just used ETA and never touched the advanced settings.
The
Static option allows you to set whatever fee rate you want.
Eta and
Mempool use different algorithms for fee estimation. It doesn't matter which option you choose, it won't affect the speed at which your transaction will get confirmed. What matters is the fee rate you set.