Build 2 is better. One quick question do you want to overclock? If you do not overclock I can get you a better build for the same price and double the virtual cores on the i5.
Build 2 has a better CPU. It also has a excellent mobo and rest of parts.
I will also say the build needs 1 improvement especially that is the PSU. Corsair builder PSU's are notoriously bad and not recommended for gaming systems like this. You do not want to risk your other parts for a 20 dollar benefit.
More than both the i5 and AMD. Probably 10+% more for 6 dollars more if you stream / render. If you do not overclock it is a no brainer to get the Xeon
Also the 6 dollars is well made up with the better quality PSU.
If you want you can change the mobo I selected with the Gaming 5 Gigabyte as it is a very good mobo and will allow for SLI and it has a better color scheme.
The build you posted only has a 6 dollar difference but I will see what I can do to make build 2 have a Xeon.
You realistically only need 8GB of RAM to start with you can always upgrade it later. Made the mobo cheaper. Still about 27 dollars off but well worth it.