The answer to 'which is better gas water heater or electric water heater' is that both gas and electric water heaters have their own advantages and the best choice depends on your specific needs and situation. Gas water heaters are generally more efficient and have lower operating costs, but they require a gas line and proper ventilation. Electric water heaters are simpler to install, don't require a gas line, and may be safer for some homes, but they have higher energy costs.
When choosing between a gas or electric water heater, consider factors like the upfront cost, your home's energy sources, energy efficiency, and the expected lifespan of the unit. It's also important to properly maintain the water heater and consider the cost of repairs and replacement over time.