I have to make an educated guess. Since I own a AK SP2000. The SP3000 would likely sound better and it gives you much better options for using while traveling, on vacation... etc. That is why I bought mine.
Although, high noise environments like automobiles and planes are very different environments. I find that high end sound gets very compromised because the treble gets drowned out. When I travel, I use Bose Quiet Comfort headphones and my iPhone. While not high fidelity... it is really enjoyable to listen to . The sound is a little cartoonish, but it sounds balanced, punchy and musical. If you take "high fi" into high noise, it sounds flat.
Also, compromising by splitting uses of a component generally severely degrades the performance of all uses. I am not a fan.
No