Levels of sweetness in those 3. Ry1 and Ry3 tastes very close. Ry1 has a sharper taste than the Ry3. The Ry3 is a tad sweeter. Both tobacco bases are the same. I don't think they would make a good blender. I like Indian tobacco for blending. Has a fresh tobacco taste like snus tobacco. The Ry's have a cig taste.I use FA Virginia in a lot of my mixes, is this something I should try? What is the difference in RY1, RY3, and RY4?