I'm in a quandary... I downloaded the trail of each but they've run out and I haven't decided. (Incidentally, Lineform still runs in demo mode despite the thirty days being up, but Zeus doesn't.) I liked that Lineform had layers, and liked its Quartz effects. But I preferred the way you could draw multiple brush strokes in Zeus without having to re-select the brush tool each time, as you would in Lineform. I did find that it was difficult to frame a drawing in Zeus (ie, printing and saving as a pdf) as the canvas seemed infinite and without any page margins. In Lineform the canvas was the page. But I did like the way you could easily make brushes from any objects in Zeus... Anyone have any opinions on either?