Origin vs. Maingear -- is one better? Practically identical builds

[username4t]

To my surprise, I was able to construct almost identical builds at Origin and Maingear -- within five dollars of each other. Both currently have free shipping. (No, I don’t want to build it myself.)

I like Origin’s Phantek Evolv better than the NZXT s340, but Maingear has a promo for three-year parts warranty (of course I’d need to ship it back to them…)

1) Does anyone like Origin over Maingear or vice versa?
2) Do I need the 240 liquid cooling?
3) How’s the rest look? It's for use on a Dell S2716DGR for GSync 27" 2560x1440 at 144Hz gaming (haven't purchased this yet) -- $450 at Best Buy.

Origin:
Case: Phantek EVOLV mATX
Motherboard: ASUS STRIX Z270G
Processors: Intel Core i7 7700K Quad-Core 4.2GHz (4.5GHz TurboBoost)
System Cooling: ORIGIN FROSTBYTE 240 Sealed Liquid Cooling System for 1151 Socket
Thermal Compound: GELID GC-Extreme CPU Application
Memory: 16GB ORIGIN PC DDR4 Powered by Kingston 2666MHz (2 X 8GB)
Graphic Cards: Single 8GB EVGA GeForce GTX 1080 SC
Power Supply: 650 Watt EVGA SuperNOVA G3
Hard Drive One (Operating System Drive #1): 500GB Samsung 850 Evo Series
$2252
 
Maingear:
Chassis: Black NZXT S340 Chassis ( no MAINGEAR logo)
Motherboard: MSI Z270 SLI PLUS with Integrated Wireless AC
Processor: Intel® CoreT i7 7700k 4.2GHz/4.5GHz Turbo QUAD Core CPU
Processor Cooling: [Closed Loop Liquid Cooling] MAINGEAR EPIC 240 Supercooler
Enhanced Thermal Interface Material: MAINGEAR EPIC T1000 Engineered Phase Change Thermal Interface Material
Memory: 16GB HyperX® FURYT DDR4- 2666 (2x8GB) [Dual Channel]
Graphics Card: NVIDIA GeForce GTX 1080 8GB GDDR5x with G-SYNC
Power Supply: 750W EVGA® SuperNOVA 80 Plus Certified PSU - GTX Titan X SLI Ready
Operating System Drive: [SSD] 500GB Samsung® 850 EVO [520MB/s Sequential Reads] -
$2249

I think I'll go with the Origin because I like the case better. Wish someone would advise on the cooling.

 

[username4t]

Thanks everyone. My path is clear now. All has been revealed.