I was surprised how almost unpsychoactive clonazepam felt to me but maybe I had too big expectations from so potent benzo with long half-life but dor anxiety it worked just like benzodiazepine with no more than anxiety and seizure preventing properties with slow onset. Better for preventing it than for treating it when acutely needed.
Diazepam is surprisingly short acting in praviding comples body related tension relief but it is very rapid acting antianxiety and anticonvulsive benzodiazepine with high muscle relaxation effects and after that short period of effects there are still some subtle but very long lasting effects which could be intensified into constant and complex both mental and physical relief by taking at least 30 mg every day for a few days. You will build so much diazepam and mostly nordiazepam in your system that it would be definitely noticable all the time. Just take it every single day for 5 - 7 days.
Taking more than 30mg every day will result in profound sedative effects 24/7 and it may be problem if u will need to take one of classical downer-like opioids because u will be nodding for hours maybe for the whole day ( there are some less downer-like opioids like tramadol, oxycodone or tapentadol which can't be compared in "nod-potential" to even codeine, morphine, dihydrocodeine, fentanyl etc. - pure mu opioid agonists without special monoaminergic or other opioid receptor related agonism making them less of straight sedative analgetics ).
So I have the same feeling about clonazepam and diazepam like the other guy.
Clonazepam potent for anxiety and seizure prevention and diazepam potent for both mind and body relaxation induction. And after daily use it's impossible to not feel it 24 hours per day for days.