The speed chips are nice if you have a PDS ezgo, since I have a series, which has a simpler system, I cant use a chip. The ease of modification is easier however. I do not have regenerative braking- that is the biggest difference. It allows me to modify my cart easier.
Here is my cart when i dropped it off- (I'll post new ones when i get her back)
But proper 12v wont save you any money- A 12v trojan is $250 or something like that. To save money you would be using an improper battery so I assumed he was talking about using 3 marine or auto batteries.