Hello Dave, the blender brush is my favourite of all Bob Ross brushes. It's not better than the regular 2 inch brush, they are both completely different brushes and have different uses. The regular 2 inch brush will apply paint to large areas quickly and easily, you wouldn't use the blender for that job. The blender brush is brilliant for where a light delicate touch is needed for blending colours together on your oil painting, or blending away thickness in the paint to create a lighter more delicate effect. I couldn't make a half decent cloud until I discovered the blender, but other people do. It's great for painting with as well. Tap gently into the tiniest amount of paint and then tap on to your painting to make a misty effect at the base of waterfall for example, or to apply a fluffy misty cloudy effect in front of a mountain without disturbing the under layers. Some people can get results like that with other brushes, but I prefer the blender for that job. The blender is very soft and has a fragile feel to it. When it's new you can have issues with it shedding hairs, a lot of hairs, which are fine and a devil to pick off a wet painting, both of mine did it a lot, I thought there was something wrong with them, but after having used them several times they have now settled down and they are a joy to use. Don't beat the devil out of your blender brush, rinse it in odourless paint thinner, stroke it gently across the beater rack and then wrap it in paper towel and squeeze it until almost dry, then unwrap and leave it to air dry. Because the blender is only used very lightly and it can be wiped on paper between uses, I only ever need to wash my blender once, at the end of the session. That's what I do, it works for me. You don't really need a blender brush to paint Bob Ross style, you can manage without it, but I love mine. Hope that helps.
https://youtu.be/5AvsPKXiRQI