Angling your speakers will not be the same for several reasons. First, as you move in your chair, either slightly forward or back, you will affect the angle of your head to the speakers, while keeping your head at the same height; thus, you will effectively be changing the apparent "height" of your speakers relative to your head. Second, if you have a coffee table or anything else like it, it may block the sound more than if you have your speakers on stands. Third, the bass may become boomy, as being near a room boundary affects bass response (and increases it). Fourth, you will likely have increased reflections off of the floor, as the bottom of the speaker will be closer to the floor, though what this will be like will be very dependent upon the particular speakers.
That said, it is better to angle them than to just set them flat on the floor, and if you can also raise them that foot that you mention, that will help, too.