Depends on what price point you are looking because at certain price points, especially in the laptop market, Intel offers better performance than AMD. Take for example the low end A8-6410 / A8-7410 APUs used in $400 - $500 laptops. The integrated Radeon R5 (Beema / Carrizo) graphics core is less powerful than an Intel HD 4000. You can buy a Core i3 / Core i5 CPU in that price range with an Intel HD 4400 / 5500 graphics core which is more powerful.
In terms of the most powerful integrated graphics core... Intel actually has the most powerful iGPU, the Intel Iris Pro 6200. It's performance is pretty close to a nVidia 940m, far more powerful than any AMD integrated GPU, but they come with specific high end Core i7 CPU in laptops that costs at least $900.
And since the last post was back in January 2014, I am locking this thread. No point in resurrecting an old thread even if Halloween is this month. If you want to discuss iGPU performance between AMD and Intel, you can always start a new thread.