Too generic of a question. Music is not only subjective but there are a TON of variables that you have to factor in.
You asked which is better. Better for what ? What exactly is the goal ? daily driver with low hz ?, SPL setup in which your trying to get the highest possible decibels ? well rounded SQ setup that isn't peaky and optimal for listening to a broad range of music ?
How many watts are you not only running but how many watts can your cars electrical physically produce ? Sealed or ported ? If ported what is the port going to be tuned to ?
You can't just ask which is better. In some cars/installs the Mojo might be the best option, in other cars/installs the American Bass might be better.