I just got this cactus with large red and white spines and I'd like to know its species. It looks like a ferocactus emoryi except the spines are not hooked. But it could be something else as there are so many different species of ferocactus. Some species of gymnocalycium also look like this.
You're close with Ferocactus emoryi, but it's a different variety - I think it's a young Ferocactus recurvus, also known as Bisnaga recurva, image in the link below, scroll down a bit to find it