Sand Dollar Enterprise, is back with a pair of new filings with the FCC pointing to a refresh of the PlayStation 3 Slim hardware. We don't know specifically what has been overhauled inside, though the two new SKUs, CECH-2101A and CECH-2101B, mimic the coding scheme of the current hardware, which is CECH-2001A and B. The alphabetical differentiation relates to different hard drive sizes inside, with 120GB and 250GB options available today and likely to be replicated in the forthcoming consoles. Looking at the FCC's radio testing, we find the same 802.11b/g and Bluetooth 2.0 + EDR transceivers as are in the current Slim, leading us to believe the changes are elsewhere or, as PS3 News suggests, maybe Sony has just found new manufacturers for the same chips and had to run them through the validation committee again. It's just that the latter is far less exciting than the idea of Sony starting up an upgrades war with some tasty springtime spec bump.