SZ series of VAIO notebooks, the VGN-SZ91 and -SZ81, which add Intel Core Solo and Celeron processor options to the Core Duo procs already available. Both 13.3-inch models sport 1,280 x 800 WXGA displays, but the SZ91 incorporates a thinner LCD that lobs off a few millimeters of thickness compared to the SZ81. Battery life is also slightly better on the SZ91, with a claimed 7-hours of juice in Pentium-equipped models, which is about an hour more than the SZ81 supposedly can muster using the same processor. Other than these relatively minor differences, the features on both laptops are basically the same, with integrated graphics (GeForce Go 7400 available for extra), from 512MB to 2GB of RAM, 802.11a/b/g, PCMCIA/ExpressCard slots, and options for Bluetooth 2.0, FeliCa support, and a fingerprint reader. Sony will drop both models on the 13th of this month, with the SZ81 starting at $1,343 and the SZ91 at $1,486.