Imo they are very different, as some already said i find 4-HO-Mipt to be something more similar to a shroom experience, even if it is more 'physical', above 25 mg the bodyload is high, the visuals are stronger and it is a superior music enhancer but mushrooms are more deep,introspective and insightful.
I don't find 4-HO-Mipt to be stimulating, i wouldn't move from my bed in a trip with it, and anyway with this bodyload (not unpleasant) i wouldn't go far
With 5-MeO-Mipt there is definitely more stimulation but still not something strong (like LSD for me) that i need to move around, the visuals are far milder as for the bodyload, i find it easier and maybe more fun but less interesting for sure.
It is also an incredible sexual enhancer, there are no problems with erection (unlike most psychedelics) and the orgasm with 5-Meo-Mipt is just WOW! :D
I can't associate 5-MeO-Mipt with other substances i've tried, it has its own and peculiar character.
Both are great substances, depends on what are you searching,they can both give good times.
Anyway my range was 20/33mg for 4-HO-Mipt and 12/15mg for 5-MeO-Mipt
If i had to choose between them i would go with 4-HO-Mipt also because the visual activity is one of the main things i search in a trip and 4-HO-Mipt gives incredible OEVs at the right dose.