would love to get like a soft core overview of all these riscv cores. Like are they open source, what sort of coremark score do they get, how big are they, etc

would love to get like a soft core overview of all these riscv cores. Like are they open source, what sort of coremark score do they get, how big are they, etc neorv, serv, vexrisc, nios v, microblaze v, etc