I've never done any development for the non-8-bit Atmel/Microchip products, so I can't really compare. The NXP Cortex-M3 I'm currently using for a project has one SPI and two SSP peripherals.
My impression from talking to other engineers is that there isn't a lot of investment in those architectures (financial or emotional...) and most people think that economies of scale will make ARM dominant in the long term. From a business perspective, neither company seems to believe they can afford to be without an ARM product line.
My impression from talking to other engineers is that there isn't a lot of investment in those architectures (financial or emotional...) and most people think that economies of scale will make ARM dominant in the long term. From a business perspective, neither company seems to believe they can afford to be without an ARM product line.