I'm a professional musician, and my son has used two different types of car-specific subs.
Generally, "hard" and "loose" hitting may actually be a function of woofer size rather than brand or type. For instance, bass guitarists and keyboard players prefer an array of 10" woofers rather than 12" or 15" woofers for definition and clarity - 12" and 15" often produce a lot of visceral impact but notes are fuzzy and ill-defined.
My son has now used both Rockford Fosgate and JL Audio subs, has gone with two 10" subs in both cases, and we prefer the JL subs over the RFs all day long. Some of that has to do with the speaker, I'm sure - but he's also changed and upgraded the tuned enclosure, which will have at least as much effect on the overall sound as the speaker itself.
So from our experience I can also recommend the JLs, recommend you go with 10", of course make sure your amp has more than adequate headroom, and be sure to use a quality, tuned, enclosure suited to your purpose and application.
Best to you.