YMMV, but all the Apple stores my area (Seattle) carried the following configs
stock 11 - w/64, 2G, 1.6
ssd upgrade only - 11 w/ 128G ssd 2G, 1.4
'loaded' - 11 w/ 128g, 4G, 1.6
stock 13, w/128, 2G, 1.86
the loaded 13 was only available at one retail apple store in my area.
13 w/ 256, 4G, 2.13
the only way to get 4G out of the stores is to get the respective 'ultimate' builds.
best