6 volt batteries

Interesting question. Its kinda of like asking which one of two beautiful blondes is the best. They both are the best. I've had a Deka battery in my Goldwing and Harley-Davidson motorcycles, and I now have Trojan T-106 in my motohome. I once drove from Hemet, California to Phoenix, Arizona, just to pick up a Deka. With that said, I would venture to guess that the Trojans are more widely used in golf carts and motorhome applications than Dekas, but that does not necessarily make them any "better."