TWIN2X2048-8500С5D 4GB the same?

[sttobin]

Hello,

 

I purchased one TWIN2X2048-8500С5D during 2007. Recently I purchased another TWIN2X2048-8500С5D.

 

The one I purchased in 2007 has on the sticks:

XMS2-8500 1024MB 1066 MHz 5-5-5-15 XMS8505v1.2 07030842-14. It doesn't state voltage.

 

The one I recently purchased has on the sticks:

XMS2-8500 1024MB 1066 MHz 5-5-5-15 2.20V ver 1.2 09387536.

 

On one side of each stick both new and from 2007, it has:

50-00170B-G (I'm pretty sure it's a "B" although it almost looks like an "8").

 

So my question is whether these sticks are all the same?