I didn't find pseudoindoxyl to be much stronger, just more sedating. I once took 6 tablets of pseudoindoxyl and was disappointed (it was actually 5 pills, then 1). Yes i was nodding off but there was something underwhelming about it.
I always take 7-OH and the pseudoindoxyl sublingually. Which is similar to snorting I suppose (never tried snorting them, and the only ones that seem worth trying are the little pellets). But ill keep on using them sublingually.
I personally find 7-OH has more pop to it, especially when its good quality. I end up manic, cleaning etc, which i like. The pseudoindoxyl isn't very motivating, or particularly euphoric.
They both have a weird comedown to them. I can easily use a dozen 7-OH pills in a day and end up feeling depressed and weird for a few days. In a way that seems distinct from opioid withdrawal. Almost feels like ive been poisoned.