Yeah, E die would be a bit cheaper but no guarantee it would be dual rank. May just grab the v-Color and hope for the best.Honestly get whatever is cheaper. But I was able to get slightly lower latency on cjr/djr than e die. My experience is only with single rank 8gb sticks. The e die kit could do 3600-3733 16-18-18 and cjr could do 17-19-19 (good bin djr should do 16-19-18). Secondary were similar but trfc gave the edge to cjr (500trfc vs 580 on e die). Like said earlier a good bin of DJR can do (460-480). I think DJR does better because it scales better with voltage.
Good luck on your ram hunt.