In no particular order
1) Cooler, quieter, less power consumption
2) Wifi AC
3) PCIE 4x 1TB flash option with Apple firmware optimization and Apple TRIM
4) new UEFI+GPT bootcamp of PCIE ssd Macs (useful for some stuff like plug and play external GPUs in Windows)
5) Two thunderbolt ports for a grand total of 12 TB devices (think of the possibilities, one port could be completely dedicated to eGPU)
6) Thunderbolt2 instead of Thunderbolt1 (20Gbps vs 10Gbps), again useful for eGPU
(subject to changes and additions)
Now many of you will hear about "eGPUs" for the first time, but basically it's now extremely easy to hook up a badass nvidia Maxwell GPU (like a gtx 970) to your Yosemite Mini (using products like Vidock 4, Akitio Thunder2, Sonnet III D and the like), there's a lot to read about it on "tech inferno forum".
http://bit.ly/1FMdAvD
http://www.journaldulapin.com/?p=17538
In that regard, the 2014 Mini, having TB2 and two ports, is better equipped.
Think about what kind of "modular" Mini the 2014 can end up being.
A 4x1TB ssd raid0 for booting and 5x6TB for storage on one TB2 port.
A GTX 970 on the other port.
Down the line, 3-4 years from now you only change "the brain" (the Mini) but you keep all the Thunderbolt equipment. The miracles of having an "external PCIE" interface.
Apple won't give us a "MacX" or "MacCube", but with two TB2 you can basically build one on the outside.
With one TB1 not so much.
But go ahead hoarding on the 2 years old model. (of course people actually benefitting from a quad core in their workload are right, but everybody else...it's a "2012 Mini hysteria"....)
1) Cooler, quieter, less power consumption
2) Wifi AC
3) PCIE 4x 1TB flash option with Apple firmware optimization and Apple TRIM
4) new UEFI+GPT bootcamp of PCIE ssd Macs (useful for some stuff like plug and play external GPUs in Windows)
5) Two thunderbolt ports for a grand total of 12 TB devices (think of the possibilities, one port could be completely dedicated to eGPU)
6) Thunderbolt2 instead of Thunderbolt1 (20Gbps vs 10Gbps), again useful for eGPU
(subject to changes and additions)
Now many of you will hear about "eGPUs" for the first time, but basically it's now extremely easy to hook up a badass nvidia Maxwell GPU (like a gtx 970) to your Yosemite Mini (using products like Vidock 4, Akitio Thunder2, Sonnet III D and the like), there's a lot to read about it on "tech inferno forum".
http://bit.ly/1FMdAvD
http://www.journaldulapin.com/?p=17538

In that regard, the 2014 Mini, having TB2 and two ports, is better equipped.
Think about what kind of "modular" Mini the 2014 can end up being.
A 4x1TB ssd raid0 for booting and 5x6TB for storage on one TB2 port.
A GTX 970 on the other port.
Down the line, 3-4 years from now you only change "the brain" (the Mini) but you keep all the Thunderbolt equipment. The miracles of having an "external PCIE" interface.
Apple won't give us a "MacX" or "MacCube", but with two TB2 you can basically build one on the outside.
With one TB1 not so much.
But go ahead hoarding on the 2 years old model. (of course people actually benefitting from a quad core in their workload are right, but everybody else...it's a "2012 Mini hysteria"....)
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