What is the HP/SP evo?
HP = High Performance
SP = Standard Performance
LV = Low Voltage
SV = Standard Voltage
You get one from column A (performance) and you get one from column B (voltage).
I don't recall which combinations are available, but I have 3 total.
The "original" would be considered SP/SV. Somewhere along the line they sold HP/LV cores (betas I think), and at least one other combination (SP/LV maybe?). Sorry I would have to dig them out an look at the paperwork that came with them. I know the LV core was supposed to be stamped "LV" on the bottom, but mine was not (I confirmed with TV that it was indeed LV).