need help with two builds

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With the motherboard being the only difference, probably not much. If your wanting this primarily for gaming, the 4690K with a Z97 board is going to give much better performance, especially overclocked. The PSU you have also isn't the greatest.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($224.95 @ SuperBiiz)
CPU Cooler: CRYORIG H7 49.0 CFM CPU Cooler ($34.50 @ Newegg)
Motherboard: Asus SABERTOOTH Z97 MARK S ATX LGA1150 Motherboard ($362.16 @ Amazon)
Memory: Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-1866 Memory ($69.99 @ Newegg)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard...
With the motherboard being the only difference, probably not much. If your wanting this primarily for gaming, the 4690K with a Z97 board is going to give much better performance, especially overclocked. The PSU you have also isn't the greatest.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($224.95 @ SuperBiiz)
CPU Cooler: CRYORIG H7 49.0 CFM CPU Cooler ($34.50 @ Newegg)
Motherboard: Asus SABERTOOTH Z97 MARK S ATX LGA1150 Motherboard ($362.16 @ Amazon)
Memory: Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-1866 Memory ($69.99 @ Newegg)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($65.99 @ SuperBiiz)
Video Card: MSI GeForce GTX 970 4GB Twin Frozr V Video Card ($324.99 @ B&H)
Case: Cooler Master MasterCase Pro 5 ATX Mid Tower Case ($133.80 @ Amazon)
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($59.99 @ NCIX US)
Operating System: Microsoft Windows 10 Home OEM (64-bit) ($87.95 @ OutletPC)
Total: $1364.32
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-02-08 13:14 EST-0500

http://www.cpubenchmark.net/singleThread.html
 
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