redis or memcached, which one do you usually grab for caching?

hey folks, ive been wrestling with cache choices for a new project. weve got some pretty simple key-value lookups that need to be lightning fast. my gut says redis, but memcached is so straightforward. anyone have strong opinions or recent experiences to share? what factors really push you to pick one over the other in practice? looking for real-world scenarios, not just benchmark numbers