Yes, though both go upwind great. I would say the Nemesis lets you ride faster to generate more apparent wind, you can apply a light edge and fly upwind. Whereas the Yarga gets the job done through grunt and a heavier edge. You go slower on the Yarga, but you still go upwind.
Also since the Yarga sits back in the window further, gusts tend to pull downwind a little more.
The Nemesis has a lot less rear line pressure, so if you like that feel, I would go for it.
They both have their place and a lot of it has to do with riding conditions and taste. I like the Yarga more in heavy chop and waves, and the Nemesis more in flat water. Nemesis well powered in flat water lets you ride super fast with a ton of control. Feels great! But in heavy chop and swells it can be tough to find a comfortable pace. Yarga lets you grind it out real slow, so you can keep your edge in big chop.
I would say if you've flown high AR in the past and liked it, you will really like the Nemesis. If you are looking for more grunt, give the Yarga a try.