I would expect that the installer would have seen that and said, WTF? If not, then it was probably done at installation. No offense if you're the installer.
The sticks in your first pack are clearly honda original with the PTC strips.
The sticks in the greentec are typical of what are used in aftermarket pack builds - chinese cells. When properly sorted by a competent builder, they can be very high quality.
There's a red wire that traces along the orange panel you removed. Does it have a 1" section cut from it? If so, good. That means the PTC circuit has been bypassed. If not, your new pack needs to be modified, or it should have a resistor where the Honda pack is cut.
I violently recommend you pursue grid charging/discharging vs. stick replacement/refurbishment. It's the difference between a mildly unpleasant afternoon vs. setting your head on fire and putting it out with a hammer.
DIY charger/discharger:
https://docs.google.com/spreadsheets...it?usp=sharing
You technically don't need the 12V PS since you can't run the fan w/o a PWM signal. You'll have to do it out of the car and if it works, probably every oil change thereafter.
Alternatively, Hybrid Automotive sells a turnkey solution that allows convenient charging in-car.
Steve