They will be the same, or very very close to the same. (If there is a difference, it is because a lens is not always EXACTLY the focal length specified. In other words, one 24mm lens may in pure reality be a 23.8mm while a different 24mm lens may in actuality be a 24.2mm lens. So you are not always going to get the exact same view with different lenses even though they may spec out at the same numbers. Lens focal length is stated according to the LENS, not the camera body. The EF lens is made to cover the larger area of 35mm film, (or so called full frame sensor), whereas the EF-S lens is designed to only cover the smaller APS-C sized sensor in a "cropped frame" camera. So you could say you are "wasting" some of the EF lens image on a crop sensor body whereas the EF-S lens is made from the ground up to work perfectly with the smaller sensor.
My advice is that if you have even the slightest desire or feel you want to move to full frame in the future, go with EF lenses now.