If you look on google maps (lanscape view), you'll see that they are side by side and across the road from the ocean and rocks.
No beaches near by, just rocks (right across the road) so you should be able to hear the waves crashing ashore.
Your balcony faces the ocean & road.
The Atlantis appears to be 3 stories, the other 2. Considering you would want to leave the door open like me, I think I'd would want to be on the top floor.
Atlantis is a bigger property than Ocean house. Its been a while but if I am not mistaken, Atlantis have hotel like feeling with shared balcony wrapping around the property, while Ocean house is more like a B&B style. As already pointed out, its all next to each other across the road from the ocean.