Remember that upcoming Sony Xperia D5103 that appeared in benchmarks, with specs close to the Moto G? Well, it might actually be called Xperia G, if this latest leak is to be believed.
Xperia Z1, and the tweet states that's a new kid on the Xperia block, marked with the letter G. It evidently sports a tad smaller size, compared to the Z1, indicating maybe a 4.6" or 4.8" display, unless Sony has shrunk the bezel and managed to slap a 5-incher in there.
If that's the D1503, which appeared in benchmarks, the midranger will offer a 720p HD display, powered by a 1.4 GHz quad-core Snapdragon 400 processor. It is also listed as running the latest Android 4.4 KitKat, so there's a chance we will see it announced at Sony's MWC event, alongside the eventual Sirius flagship.