2 ready built computer, same price, which one is "best"

You say they cost the "same", but the top one is $200 more lol..and obviously better cuz of RAM, etc. like Jason said. But, if you're only going to use this PC for gaming/web-browsing, I would highly suggest opting for an i5 instead of an i7. With that being said, you should also go for 8GB since most games only need 4GB-6GB max. It really doesn't make sense getting 16GB RAM unless you're trying to future-proof your build as much as possible or you're going to do more than just gaming (like editing and stuff). Also, for a build with a 970 in it, you should get a sexier case with more features, such as the 450D, 400R, Enthoo Pro (not saying the HAF is a bad case, it's just ugly imo), or if u have the money, the 760T. All are excellent cases, my favs are the Enthoo Pro (my case) and the 450D. Here is a build you can consider:
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($212.99 @ NCIX US)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($28.75 @ OutletPC)
Motherboard: Asus Z97-A ATX LGA1150 Motherboard ($136.99 @ SuperBiiz)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($87.00 @ Newegg)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($138.99 @ SuperBiiz)
Storage: Seagate 2TB 3.5" 7200RPM Hybrid Internal Hard Drive ($101.05 @ Amazon)
Video Card: MSI GeForce GTX 970 4GB Twin Frozr V Video Card ($345.99 @ B&H)
Case: Phanteks Enthoo Pro ATX Full Tower Case ($99.99 @ Newegg)
Power Supply: Rosewill Capstone 550W 80+ Gold Certified ATX Power Supply ($64.99 @ Newegg)
Total: $1216.74
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-31 13:34 EST-0500

OR if u want the best a 980, the best single card GPU on the market, and the most futureproof card u can get

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($212.99 @ NCIX US)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($28.75 @ OutletPC)
Motherboard: Asus Z97-A ATX LGA1150 Motherboard ($136.99 @ SuperBiiz)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($87.00 @ Newegg)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($138.99 @ SuperBiiz)
Storage: Seagate 2TB 3.5" 7200RPM Hybrid Internal Hard Drive ($101.05 @ Amazon)
Video Card: MSI GeForce GTX 980 4GB Twin Frozr Video Card ($554.99 @ Newegg)
Case: Phanteks Enthoo Pro ATX Full Tower Case ($99.99 @ Newegg)
Power Supply: Rosewill Capstone 550W 80+ Gold Certified ATX Power Supply ($64.99 @ Newegg)
Total: $1425.74
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-31 13:40 EST-0500

OR if you want a complete overkill beast rig with 2 970s that will destroy a single 980 (I would recommend either the single 970 or 980 over this tho because single card is always a better option due to heat and compatibility issues) but seeing as u have the money, u can go with any one

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($212.99 @ NCIX US)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($28.75 @ OutletPC)
Motherboard: Asus Z97-A ATX LGA1150 Motherboard ($136.99 @ SuperBiiz)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($87.00 @ Newegg)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($138.99 @ SuperBiiz)
Storage: Seagate 2TB 3.5" 7200RPM Hybrid Internal Hard Drive ($101.05 @ Amazon)
Video Card: MSI GeForce GTX 970 4GB Twin Frozr V Video Card (2-Way SLI) ($345.99 @ B&H)
Video Card: MSI GeForce GTX 970 4GB Twin Frozr V Video Card (2-Way SLI) ($345.99 @ B&H)
Case: Phanteks Enthoo Pro ATX Full Tower Case ($99.99 @ Newegg)
Power Supply: Rosewill Capstone 750W 80+ Gold Certified ATX Power Supply ($49.99 @ Newegg)
Total: $1547.73
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-12-31 13:38 EST-0500

Oh yeah and 2tb is a lot of storage, you sure u need all of that? U could get two 1 TBs and use one as backup cuz sometimes HDD fails on u (it happened to me already)

Oh ok sorry I didn't kno u were gonna stream and edit videos, u should've stated that at first But yeah you should go with the 16GB ram. i7 processor tho? Still not sure about that, I don't think its worth it imo..the 4690k is a beast and will last a long long time I'd say.

As for the case, some people don't care about the appearance, but u should weigh the features/price of each still and see which one offers the most at the best price. Ur case will outlive all of ur components so it's important that you pick a good case. A good case will offer great airflow, easy cable management, and nice upgradeability.