If you're going to be taking this knife out in public, id go with the ontario rat 2, in my experience, the flat grind gets better reactions vs other grinds. The blade shape too. The skyline will deploy faster, but I feel like the rat can take a bigger beating vs the skyline. This is all based on what I know of each maker. I personally do not own either, but have used both.
But to be completely honest, both of these knives will work perfectly fine. Just pick one that you think looks better, or one that you think will have better ergonomics (how comfortable would it be to hold each for extended periods of time?)
Also type each knife into YouTube. A few channels are highly regarded in the knife community are: nutnfancy , gideonstactical , Kaila Cumings (she's hot, but she knows what she's talking about), and WeAllJuggleKnives
If you've done your research, then pick whichever appeals to you most!