Not quite. There's a number of advantages of having the larger battery pack even if you aren't driving long distances: 1. Faster supercharging. 2. Degradation over time won't shave off precious miles you might need. 3. Longer lifespan. The cells are rated for 1500 charge cycles. With more cells, you have many more miles the pack is capable of. e.g; 1500*240 vs 1500*310. Additionally, your discharges will have less depth, which also aids in decreasing degradation. There are some cons, cost and weight being the main ones.