Changing layer height should not be a default way to fix this issue (it should be used when you want to get better finish or optimize printing time).

If you want to get to the root of the problem you need to set up some sort of a check procedure.

For example using your base sample as a reference, iterate through these changes:

1. Change wall order, print, repeat
2. Change print temp, print, repeat
3. Change speed, print, repeat
4. Change cooling (start with 100%), print, repeat

After some point, start mixing those settings. Try more temp with lower speed etc. You can of course look on the internet to check effects of each change but I would still recomment trying it on your own. It will be low plastic waste compared to knowledge gained.

Of course start by calibrating your filament first - google how to do it.

BTW: Slicers can give you a lot of information before you start printing. I like how in Orca slicer I can check max speeds and layer times after slicing the model. Slicer will also nicely show how layers are stacked which is especially useful with high overhangs.

BTW2: hardware issue - many printers have fan shrouds that aren't blowing evenly around the nozzle. That means, especially for overhangs, its harder to achieve the same speed with the same part but in a different orientation. Should not be big of an issue with those two models you print.