If we're just talking derailleurs as the only appreciable difference, then, no...
Price is an important factor here, but I would always make the way the bike fits you and handles for you the number one determinant of choice. Insist on test riding both - and not just around the parking lot... Have the shop swap out stems, saddles, pedals, etc. until you get the right comfort and position on the bike. Many shops won't do this, hopefully your Performance dealer will.
I didn't check specs on your two candidates, so there may be other reasons for the difference in price. Scattante is a house brand for Performance, so unless the Schwinn's on sale, it may be the "value" bike in your comparison.
Just remember - parts like derailleurs can be easily changed. A bike's basic fit and handling is pretty much a forever deal. Get that aspect right above all else.
Good luck.