Exactly. People have used high speed 6" grinders and slow speed 8" grinders successfully for years. I think these are perfectly manageable speed for grinding steels used for woodworking tools. However, I see "high speed 6" is about the same speed as slow speed 8"" quite often, but they are not and I think such difference (33% speed difference) should be clearly advised so that the person who are considering on buying a grinder can make informed choice there. I'm not saying one is better than the other, but I think at least information should be clear and reasonably accurate.