Small prints like that especially in vase mode do not allow enough time to cool between layers.
The filament profile has ‘Max fan speed threshold - Layer time’ and ‘Slow printing down for better layer cooling’ option. They are the options you should be using to allow sufficient cooling when needed not an overall speed reduction.
That said the print speeds are fast enough at 0.4mm to be slowed by filament volumetric flow limits which means larger nozzles don’t reduce print times by very much. The only good use case for larger nozzles is not getting bunged up by filament with stuff in it and for wider walls in vase mode.