I am Graphic designer, and Adobe master collection was my first installation. This new mini starting for 7sec. and shut down for 2sec. For me this is amazing. My Smart TV starting for more time. Mission control, notification center and other animations are much more smoother from the 2012's mini.
..and iPhone is with dual core processor, but is much better from every 4 cores smartphones. This is my answer for the question 4cores old machine or 2cores new mini.
.. and the last.. old mini is with fusion![]()
Then your comparison isn't fair unless you had less than 128gb on your fusion drive. Put a Samsung 850 Pro 256gb SSD in your 2012 quad and get back to us.
I've got a 2013 Haswell rMBP 13 with Iris and a 2012 rMBP 13 with HD4000 in the same household and while the 2013 is a little bit smoother in Yosemite animations, it's not a huge difference.
Your 4 core vs 2 core smartphone comparison is bunk as the majority of Android quad core smartphones have 4 crappy cores, while Apple chooses to use 2 really good ones instead. An Ivy Bridge core is not even 10% slower than a Haswell core.