Vinyl Cut Decals (sometimes called Die Cut Decals) have no material left between the letters when the application is finished. Mylar decals have a clear film between the letters that allows your paint to show through, but you will see the outline of the material. Most customers purchase the mylar decals because of price. If you are restoring the tractor and have put a good deal of money into the paint, you'd probably prefer to have the vinyl cut decals.
Multi-Power and Float-O-Matic decals are sold separately. They can be found in the Miscellaneous section of MF decals.