With Nikons, you can adjust the shutter speed/aperture combination with the rear command dial when shooting in P. If you don't like the 1/250 @ f/8 the camera chooses, spin the dial to 1/125 @ f/11, or 1/500 @ f/5.6. They're all the same EV.
However, if you want to change the EV, use the front command dial. This will start you down the + or - EV path. Lo-end bodies that only have the rear dial use the +/- button in conjunction with the rear command dial.
I thought that this is how it works on my a700, but it's not. One wheel dials through the EV combinations, one wheel offsets time, while the EC button+either wheel will offset the aperture.
What changes when you press the EC button in program mode on Nikon?
Either way, Sony's manual mode is easier than program mode. If you want to scroll through the equivalent values you just press the AE lock button and turn either wheel, the shutter and aperture will correlate based on the EV locked in.
ETA - no, joe, its' all good. I don't mean to make this into a big competition. like I said, 90% of the reason I shoot manual is just because I always have. One big thing we're also running into is that every camera brand does things a little different.