When I did them, I felt them more in my front delts, side was burning, and so the were the rears, but more so the front. Because the Movement starts from the front then goes back.
I've done a variation of them, that I stole from a Milos FitShow video, where you're seated upright like a BB Press. Imagine a lateral, pec-deck flye with hands prone, and a reverse stiff-arm pulldown motion in one.
I do those for shoulders. But the above, I feel far more in my chest.
Kind of like how some use Pullovers for Chest, I use them for Back (another "acceptable" possibility). I also use a Pullover and Press, for Triceps.
If I feel anything in the "Around The Worlds" exercise, outside of stabilizing, in my shoulders it's separating the delt from the pectoral-in layman's terms anyway.