Don't focus on them being 1,4 or 1,5 benzodiazepines or triazolo or thienodiazepines etc, but on the pharmacological profile.
I think I would advise against 'very' partial cross-tolerance issues where you don't really have proper overlap of effects but instead trade in effects for different ones on different GABA subtypes. (Say going from an a1 selective to a2 selective drug)
The lack of sedation for clobazam can indeed be explained by being less heavy on the a1 which is a target for hypnotics, while a2 is considered the main anxiolysis target.
Clonazepam has low to moderate a1 (sedation / hypnotic effect) affinity and a study shows it is not as selective for a2 (anxiolysis) over a1.
Switching may lead to some insomnia as you may basically withdraw from not having as much a1 effect from clobazam.. but withdrawal is inevitable at some point if this is a step towards quitting entirely.