DDR3 usually has higher bandwidth because of it's higher clock rate and consumes less power.
Though, I do agree with you that to some degree, this is just pure technical talk.
Your rig is a 10.
Mine:
920 @ 4.2GHz stable
eVGA X58 mobo
3 GB Dominator RAM DDR3 at somewhere around 2GHz.
2 TB HDD
GTX 275 1792 VRAM
Antec 1200
OCZ 700W Stealth X Stream PSU
G11 Keyboard, Razer Lachesis Mouse.