The QorIQ Communications portfolio has traditionally used Power Architecture® based cores. The latest QorIQ LS series of processors has expanded to use ARM® core technology. There are a lot of software-visible architectural differences between these two types of cores, and system software is dependent on the core architecture. If a system software developer who has experience with Power Architecture based devices transitions to ARM-based processors, the developer must understand the differences between the cores so that the software can be easily migrated from a Power Architecture core to an ARM core. This session compares these two core architectures and sheds light on how software can handle the differences.