door speaker boxes for 98 - there are 2 sizes?

[DG Boxster]

I don't have any speakers in my doors. I want to add some. There seem to be two types out there for sale. One is longer than the other. According to Pelican, both "may" fix the 98 Boxster - any idea which I should buy? I imagine fitting the shorter one might be easier?

I'm planning on replacing the speakers.

This is the "short" one, P/N 996.645.012.00 Pelican lists it as par tof the M490 Option "Hi Fi Sound"


This is the "long" one, P/N 996.645.562.00 Pelican lists it as part of the M680 Option "Hi Fi Sound with Booster"