Hi
I'm pretty new to Affinity and, indeed, DrawPlus on the PC. Previously I've used, the no longer supported, Expression3 from Creature House and I hoped that one of these programs would make a good replacement.
One thing that Expression3 does is allow you to easily add feathered edges to shapes using a bitmap vector. Drawplus does a similar thing but it uses edge brushes. As far as I can see there is no option in Affinity.
Another great feature of DrawPlus is the multi-part brushes with textured parts that repeat along the brushstroke. I'm thinking of ones listed under Grunge in DrawPlus's Brush menu. The only similar effect I've found in Affinity is in the Pixel Persona section. However, since these are bitmap effects, you can't adjust them later like you can in DrawPlus.
I'm torn between the two programs. I find Affinity quite easy to use and a much cleaner working environment to DrawPlus. I think Affinity also allows slightly higher resolution brushes to be imported. I have a set of water colour brushstrokes that I scanned for use in Epression3. I've tried them in both DrawPlus and Affinity and they seem to look higher resolution in Affinity.
Ideally, although I own DrawPlus, I'd prefer to move to Affinity when it's available for sale. I just wish it had these two features.
Of course, maybe I just haven't been looking in the right places and someone can point me in the correct direction. I'm perfectly happy to be proved wrong. :)