I don't feel like reading all 16 pages and sift through useless speculations and arguments based on just numbers. What's the real difference between M290x and M295x? Yes, 2gb is smaller than 4gb and more memory is for the most part better. But what's a real world difference? Is it that there will be crazy lag while using safari? Or will it be slow while running Lightroom? Or will it be running at its limit while using an external Thunderbolt display? Will it blend? (OK, maybe not that last part). Does anyone even have a side by side comparison? Or are we just talking out of our asses without using it in the actual world?