Ok, silly question perhaps. If you withdraw pillar 3a and pillar at the same time (after having left CH so paying only quellensteuer), are the totals added up and then taxed?

I am asking because kanton Aargau for example taxes in steps (per 1000 CHF) and under 25k they are cheaper than Schwyz but if you need to add pillar 3a and 2 together, and then go over 25k, then Schwyz at 2.5% is cheaper.