The quote posted above interests me. A few years ago I debated with JR on NI about Bekko being held back by the judging standard that the head be free of Sumi. It is a demerit, while it is virtually essential that some Sumi be on the head of Shiro Utsuri.
If you can get your hands on some of the very old Japanese show books, you'll see that Bekko with Sumi on the head were not unusual. They took wins in their size/class despite Sumi on the head. In the past 20 years, such Bekko are not depicted, except some rare exception. Of course, not so many Bekko shown as in the period prior to 1985. In the 1960s and 1970s, the other varieties had not progressed so far ahead of Bekko as in the past 2 decades, so they did get shown. In the pre-World War II period, Bekko were more popular than we can realize today. There was not so much to choose from, and quality was low by today's standards.
I still believe Bekko looks best with Sumi right in the middle of the forehead, but not the standard of beauty for judging purposes. A really good Bekko is rare, because the head truly must be snow white... which simply does not occur on good Sanke. The light cream-white of the best gosanke is not a good base color for Bekko. So, it is a variety destined to never attain its potential as deserving of appreciation as Shiro Utsuri.
....just my opinions.