Having searched the market, I decided to go with this one: Vengance CML8GX3M2A1600C9 (link), as this is the closest I could find.
So it will be:
HyperX Savage 2x4GB : DDR3-1600 CL9-9-9-27 @1.5V
Corsair Vengance 2x4GB : DDR3-1600 CL9-9-9-24 @1.5V
So a small difference in tRAS, which I hope...
Thank you for your help! With that in mind, I'll have a look at the market again.
But what makes you think that my old RAM is 1.6v? What I see in the Memory Module Specification (link here and also in the OP) that is says it is: DDR3-1600 CL9-9-9 @1.5V
I'm upgrading RAM memory from 8GB to 16GB in my computer, my current setup is:
ASUS Z97-PRO GAMER motherboard and
2x4 GB HyperX Savage DDR3-1600 CL9
For performance reasons, I was going to buy the same kit as I did a few years ago. The problem is that there is no retailer selling this...