Mimosa is not used in any way similar to chaliponga..it's not even an amazonian tree and it is not used in any amazonian ayahuasca traditions.
Diplopterys has been heavily documented as an ayahuasca admixure and chemical analysis has been published multiple times. There is no reason to assume any neurotoxic side effects.
Diplopterys and Jurema are different. Diplopterys lasts longer for starters, and is a somewhat more mental/stimulating experience.
Intensity is not just due to dose either. Chaliponga can be a more intense experience. it can be more loopy and darker, lasts longer and causes more people to sort of panic..none of those effects have ever made me feel like it's toxic. I have smoked chaliponga extracts many times, snorted chaliponga crystals, used them sublingually and many many times in brews. There is just something innate in the plant that is different.
Long live the unwoke.