i would say 10 mg of valium = 1 mg of klonopin for me, but klonopins affects are more subtle so i'm arguably being more affected by 1 mg of klonopin just in a different way which i am less aware of.
Personally, I find 1 mg of clonazepam to feel like 5-10 mg of diazepam depending on potentiators and so forth. I personally find clonazepam to be extremely subtle in its effects.