Intel Core is a line of mid- to high-end consumer, workstation, and enthusiast central processing units (CPU) marketed by Intel Corporation. These processors displaced the existing mid- to high-end Pentium processors of the time, moving the Pentium to the entry level, and bumping the Celeron series of processors to the low end. Identical or more capable versions of Core processors are also sold as Xeon processors for the server and workstation markets.
Ryzen is a brand of x64 and x86 microprocessors designed and marketed by AMD (Advanced Micro Devices) for desktop, mobile and embedded platform based on Zen and Zen+ microarchitectures. It consists of central processing units marketed for mainstream, enthusiast and workstation segments and accelerated processing units (APUs) which is marketed for mainstream and entry-level segments and embedded applications.