IMHO, the two are totally different and serve different functions for me not really apples to apples, if you know what I mean . . .
Ayurvedic: the powders are awesome and I use regularly by simply adding a few tablespoons directly into my conditioners immediately before use. That's the only way I've used them using shakaka when I was extra cleansing in co-washes and amla when I want extra conditioning and strength
Dominican: I think dom products are pretty good in general and have tried a few and only found "fantastic" results with salerm 21 and lacio lacio, both protein based leave ins that I keep in stock.