Ported box will allow your woofer to drop lower, but if you don't have the power to drive it, you will either burn the voice coil or it just won't do anything.
A sealed box on the other hand, will give you a more solid bass tone, an almost "punch" like sound. But the woofer will not be able to reproduce low tones (<25hz). If you want to have the painful, ear bleeding, car vibrating bass, you should have a sealed box.
Wave Relationship
Velocity = Wavelength x Frequency
(Velocity of sound at sea level = 340.29 m / s)
High frequency sounds travel short distances because of the reduced wavelength. Therefore tweeters should always be placed in a straight line from your ears (ideal scenario, not easily done in a car)
Low frequencies have really long wavelengths eg,(using the above equation) a bass tone of 35Hz will result in a wavelength of 10meters. You will not hear the full "dynamic" of a 10 meter sound wave in a car cabin of only 4meters.
In your house, the volume of air available is much larger. This gives your ears a chance to hear the larger wavelengths.
The point i'm trying to make is Car Audio is never as good as Home Audio, when it comes to low tones because car cabins are too small to contain a full "low" bass tone.