The Basic style is defined by smooth contours for your hands to lay comfortably on the hold. You can expect 5.8/Vo out of these holds on lower angled walls. The incut is on about a 45 degree slope so as the wall gets steeper, they become considerably harder.
The Atomik Basic style has a larger foot print than our Simple style. This turns the hold in to a more power endurance hold as the wall gets steeper since you can't thumb pinch them. Thumb scum maybe.