Thanks -- just took a good look at that features comparison chart. P&GD is all you need for creating graphics.
But you need to buy Design Pro to get the desktop publishing features that are sold with P&LD... which doesn't have all the graphic art features. So -- P&GD if you are just doing art... and Designer Pro if you are creating publications as well as doing art. Which is me, every now and then. Got it!

Which gets us back to price. Is Designer Pro desktop, at less than US$150, a better buy than Photoshop, Illustrator, Indesign, Word, and PowerPoint combined? Like, once every two or three years? (Confession -- I've used Xara for years to make full-size graphics that I put into PowerPoint to be each slide, shoot me). Anyway, a better buy? Of course. Should be a mandatory purchase for every UK government agency, save buckets of money. But I'm preaching to the crowd here, right?