OK, the FPS is confounding me. Fullscreen, runs 74 FPS. Windowed, 60.
BUT ... 74 FPS doesn't feel all the fast in this game (UFO at 72 FPS, for example, felt like it was running at lightning speed), while 60 FPS felt really slow.
And so I am left with the quandry: play at the intended speed in windowed mode, where it feels slow, or play at an increased speed full screen, where it feels just right.
I'm leaning towards the latter. Heavily.