I love my Dart. It get's the job done with minimum fuss and it is a solid razor. It looks good too, sure it has machining marks on the underside of the baseplate but you will never see it in use or in it's stand. I cannot compere with the Supply. I have never used one. I don't get on with injector blades, they are all rough for me, especially the Personna ones. The Supply locks you into these types of blades, so if you do not get on with them too, you are stuffed. I think the Dart is a wonderful razor and have no problem recommending it highly. Even better if you can get a used one.