Yup, I'm aware of the name's etymology. I get what you mean, I see a consistency in it. It's all saying the same thing and if I put it next to the Dhammapada I don't really find any contradictions.

True, at the core I like to remind myself of the fact that regardless of the differences in how these sages defined things, they were all working with and analyzing the same tool: the mind.

The Yoga Upanishads in general serve to provide multiple means for different types of individuals to reach Samadhi (absorption/Jhana), from which point, the individual is expected to turn to Raja Yoga, which then begins to cross with the Buddhist path, as both Raja Yoga and Buddhist mechanics deal with deconstructing the layers of the mind and piercing through to unfiltered/raw perception of phenomena.