Actually, on a 1.6x crop body (like the 50D), the EF 50 f/2.5 would have an equivalent focal length of 80mm, which would give it more "reach" than the EF-S 60mm.
Ummm...actually,
no. Not only no, but
NO.
I suspect you are suffering from a (rather common) misconception, that EF-S lenses have a focal length that is somehow 'adjusted' for an APS-C sensor. That is not the case. Focal length, by definition, is the physical distance from the rear nodal point of a lens to the image plane. In other words, a lens marked 50mm has a focal length of 50mm, and a lens marked 60mm has a focal length of 60mm (ignoring focus breathing) - regardless of the size of the sensor behind that lens, or even whether there is a camera there at all. Focal length is focal length - it's an intrinsic property of a lens. Canon made a 60mm lens with a focal length of 60mm, they didn't make a lens with a focal length of 37.5mm then lie and print 60mm on the barrel.
So...the EF-S 60mm will have more 'reach' than the EF 50mm (10mm more reach, to be exact) regardless of the camera on which it's mounted. The EF 50mm delivers a FF-equivalent AoV of 80mm on 1.6x, and the EF-S 60mm gives a FF-equivalent AoV of 96mm on 1.6x. It's just that EF-S lenses can only mount on APS-C bodies, whereas EF lenses can mount on any body.
