In general, plug-in hybrids are better than mild hybrids, since they can be plugged in to recharge the battery, while mild hybrids rely solely on regenerative braking to recharge the battery. However, there are a few things to consider when deciding which is better for you.
First, consider your driving habits. If you do a lot of stop-and-go driving or short trips, a plug-in hybrid may not be the best choice, since it takes time to recharge the battery. A mild hybrid, on the other hand, will start recharging the battery as soon as you start regenerative braking.
Second, consider the cost. Plug-in hybrids often cost more than mild hybrids, since they have bigger batteries and more complex electrical systems. However, the extra cost may be offset by the fact that you'll save money on gas, since a plug-in hybrid can run purely on electric power for short distances.
Finally, consider the environment. If you're concerned about emissions, a plug-in hybrid is a better choice, since it produces zero emissions when running on electric power. A mild hybrid still produces emissions, even when the battery is being charged by regenerative braking.
So, which is better for you? It depends on your driving habits, your budget, and your environmental concerns. If you do a lot of driving and you're concerned about emissions, a plug-in hybrid might be the best choice. If you're on a budget, or you do a lot of stop-and-go driving, a mild hybrid might be a better option.