Hoya Pro1 vs Ultra-Pro Filters

Ian_of_glos

EOS RP
Jun 12, 2012
263
52
England
For many years I have used Hoya Pro1 filters and I have found them to be well made and durable. However, last time I bought a filter I noticed that there is now a much more expensive option - the Hoya Ultra-Pro Filter.
Has anyone compared the Ultra-Pro with the Pro1 filters and if so does the Ultra-Pro justify its very high price tag?