The 3M wheels will have a very short life compared to wire but what is important is how they work. The abrasive wheel is just that. It will literally abrade the surface and leave a texture dependent on the grit size. Wire wheels if chosen correctly will clean the surface without damage. I have both mounted on different grinders, but almost never use the 3M. In fact I tend to use a flap wheel more often. For reference, I keep a 36 grit grey wheel for general purpose, a .011 wire wheel for heavy cleaning, a .006 wire wheel for rust removal, a white wheel on variable speed for sharpening, a 3M bristle wheel because I had an extra shaft end, a flap wheel for surface modification, and a non woven abrasive wheel for further modification. I also have a separate variable speed for buffing and polishing wheels. All of these are permanently mounted on my grinder bench. In a drawer I have a bunch of more specialized wheels for odd jobs. A second bench is set up for wet grinding. There are four belt driven Poly grinders with a powered water supply. Mostly used for stone grinding and polishing for jewelry. I'm into grinders.