A little off topic maybe, but if you think about it, 3D CAD is vector based...somewhat more complex...but vector based none the less! It knows what type of lines/curves you've drawn, and where they are in space...just like autocad, and illustrator and Corel! But it uses those lines/curves as edges for surface/solid definition. It uses a more complex method of defining points/lines/curves and utilising them, which is what makes it parametrically editable, but that's the only difference
Corel vs Illustrator...horses for coarses I reckon...both do much the same things in reality I'd guess? Both been around for donkies, by now they must both have pretty much the same buttons, just with different names! Haven't used Corel since school Craig
Corel is cheaper though, and wouldn't be surprised if it was easier to learn.