The Ripjaws has lower voltage, speed, and size. The Trident may be the best choice if you are going for power (just for clarification, i don't mean electricity, i mean the speed and such.)
Update:
Here are the specs given by a G.Skill representative on Tom's Hardware:
Specification
Series Trident Z
Memory Type DDR4
Capacity 8GB (4GBx2)
Multi-Channel Kit Dual Channel Kit
Tested Speed 4266MHz
Tested Latency 19-26-26-46-2N
Tested Voltage 1.40v
Registered/Unbuffered Unbuffered
Error Checking Non-ECC
SPD Speed 2133MHz
SPD Voltage 1.20v
Fan lncluded No
height 44 mm / 1.73 inch
Warranty Limited Lifetime
Features Intel XMP 2.0 (Extreme Memory Profile) Ready
Source:
http://www.gskill.com/en/product/f4-4266c19d-8gtz
Specification
Series Ripjaws V
Memory Type DDR4
Capacity 8GB (4GBx2)
Multi-Channel Kit Dual Channel Kit
Tested Speed 3600MHz
Tested Latency 17-18-18-38-2N
Tested Voltage 1.35v
Registered/Unbuffered Unbuffered
Error Checking Non-ECC
SPD Speed 2133MHz
SPD Voltage 1.20v
Fan lncluded No
height 42 mm / 1.65 inch
Warranty Limited Lifetime
Features Intel XMP 2.0 (Extreme Memory Profile) Ready
Source:
http://www.gskill.com/en/product/f4-3600c17d-8gvk