Tire pressure is quite an individual preference where some like bro Zeng above like very firm pressure to save just a bit more fuel while some may prefer more comfort with lower pressures. Of course there's a range that where you should not go too low or too high. For your car which is quite light, I think the ideal range should be around 28-33psi, so I'd suggest you to try first at 31psi then see how you feel about it. If you feel it's too soft then you can try increase a bit to 32-33psi. If you feel too hard then lower it a bit to 28-29psi. Keep adjusting this until you find a pressure that you feel best whereby comfortable enough but also gives responsive enough handling. Just keep in mind if too low, the tread may wear out more on the edges while if too hard then will wear out more in the middle.

Yes can just 2psi difference.