LGPE RU definitly is far more rng reliant than LGPE DOU. RU has the variance in what Pokemon you can get but you are very rarely every dealt a truly bad hand; the level balancing is great and very few Pokemon are bad, most server valuable roles. The skill expression in RU is unarguably higher than DOU imo as RU in comparison has not much variance in the teambuilder; most teams carry the same 4, 5, or even 6 Pokemon as each other, with the lead usually being the same across nearly every team (Alolem), resulting in most games being dependant on nothing but Speed tie wins, critical hits, and full paralysis. RU also does not have 6 starters, by the looks of it, the pool this year for the tier will be incredibly dicey. In comparison, DOU has an incredibly deep and talented pool of players, second only in size and quality in OU.