The whole love of vintage aside, steel makes for a more comfortable ride at not a huge tradeoff for performance. The majority of folks searching for an ssfg in your price range want the bike simply to tool around town in. For this purpose, some view cf/al as kind of overkill.

I suspect the size discrepancy is due to the Kilo being sized center to center, but i can't be sure w/o seeing Scott's chart.

Which site are you ordering from?