Didn't realise you were using Affinity too, Mouse. I love Designer for map-making. I often use it in conjunction with Inkscape, cos there are a few things Designer can't do (or do as easily as Inkscape). But the fact that both programs support SVG makes it really easy to work between them, without any loss of quality.

I've only used Affinity Photo for, well, editing photos (RAW files, mostly), and it's fairly decent for that. Haven't used it much for mapping, but I've pretty much given up hand-drawing maps these days.