Mimosa is mostly of a more consistent quality.
psychotria can give a better experience but it's often too weak.
Then there's chalinponga. Chaliponga is extremely potent, but markedly different due to the presence of 5-MeO-DMT.
Mimosa can be brewed in boiling water, and then you need very little of it to get strong effects, but it will taste horribly, you will have to puke and it gives a less pleasant trip.
In cold-water infusions you need more of it, at least 30 grams of powdered stuff, but you won't have the nasty side-effects and it will taste less groce and you will probably manage to keep the stuff inside.
psychotria is very often too weak as i said, but when it works it will often have a very immersive effect. It will more often have a deeper mental dimension where mimosa gives more spectacular visual effects.
Maya's hawaian chacruna is the best chacruna i know, but it's often out of stock.
I often make a psychotria brew first, when it's cold i use that to make a cold mimosa extract. That more or less is guaranteed to work but for beginners it may be too powerfull.
Chaliponga is a category of it's own, but 1-it will definately work and 2-it will be spectacular.
It's visuals are far less colourfull, and 'pale', but more immersive than of mimosa and chacruna combined and very tangible.
There are a few ways to boost a brew. you can add a tiny amount of mushrooms that it´s too small to have effects on it´s own but that will give a boost to the oral DMT. you can also add datura seeds as long as you don't use more than 20.
Guayusa is also very often used as an additive, but for me it didn't do much.
The addition of theobromine will diminish visual effects but increase the mental effects and also bodily sensations. In general it amplifies the effects of ayahuasca, but not nessecarily in a very pleasant manner, is my personal opinion.