I can't really answer as I have the 10-core version, which is lightning fast for my moderate needs. My understanding is that the £300/$300 upgrade to the 12-core version is more worthwhile for those who are going to also benefit from the extra 3 GPU cores – it's not a waste of money is you're doing stuff that will utilise that extra power. But for me I came to the conclusion that upgrading the processor too then brought me into Studio territory and the 24 GPU cores in that machine might be a better alternative for graphics-heavy users. But that was overkill for me.