More what? How about a lot more on board flash and data RAM. dsPIC33 devices integrate up to 256kB of program flash and up to 30k of on board data RAM. Another significant improvement is the addition of a direct memory access controller to the devices. To maximize your investment in Microchip products, all dsPIC33 devices are upwardly compatible with the dsPIC30F family of digital signal controllers as well as the PIC24F and PIC24H families of 16-bit microcontrollers.