The cost of an equivalent AMD board is much lower, but so is the quality. UP4 is not the same as UP4 on Z87. A88X Sniper is not equal to Z87 Sniper. A88X Extreme4 is half that of Z87 Extreme4 in terms of power delivery yet the APUs are more power hungry. No ROG ASUS boards either.
Half the A88X boards don't even have heatsinked VRM.
The Gigabyte A88X UP4 (GA-F2A88X-UP4 to be exact) seems like a steal at ~$100 though , it's on par with Z77X-UP4 TH
EDIT: More on topic, to eliminate "Microsoft" biases
Linux review http://www.phoronix.com/scan.php?page=article&item=amd_a10kaveri_linwin&num=2
ediT2: GPGPU at Computerbase
Edited by AlphaC - 1/14/14 at 8:04pm