Hybrids weight more in comparison to same class. If you see what the Edison kit includes, you will understand what I mean - you basically get an ICE truck, which is already heavy, and add another 800 lbs (?) in batteries to it. There's no way around that. Still a better option than an EV tho, as you can at least travel further than a full charge would allow.

There are already tests out comparing regular to hybrid trucks in different situations. In perfect conditions it looks a better approach, but the added weight is a drag when you start towing or off road. The edison kit would most likely perform similarly.