You would not want to take a very long very fast drive in very hot temps, but frankly there is little difference. Both oils should react about the same at operating temperature.
The 5 vs 10 part of the designation is how the oil acts when cold, it is not material to how the oil acts at operating temperature. The 5W30 oil will start a little easier and will get the oil to the engine a little faster on cold starts.
Both oils will react the same at operating temperature.
The 10W30 will break down a little faster due to additional additives (less oil) but modern oils, especially synthetics, are so good that there is no real difference at all.