AT ART-9 vs Audio Note IQ3

What's the difference between the ART-7 and ART-9?  I see the price is almost the same, but everyone here is talking about the ART-9.

Ahh, the ART-7 is very low output.  I found this...

"According to an insider at Audio Technica (Japan) the ART7 is more for classical music because it has better micro layering of soundstage. ART9 on the other hand is a much more of an all rounder because it has a very powerful presentation which suits Jazz, Rock and Pop along with classical. ART7 doesnt have the macrodynamic force that the ART9 has. Moreover ART7 is an extremely low output cart making it a difficult cart for phonostage matching. The ART9 is much more friendly in its output voltage and matches with any decent phonostage."

I ended up buying a new ART-9 off eBay.  For those who have bought new ones, is there supposed to be two things rolling around in the box?  I don't want to open mine until I hear from the seller, Thakker.  The tamper proof seals are still in place but it just don't seem like things should be rattling around inside.

I opened the box and unfortunately the cartridge was no longer attached to the headshell mount and was rolling around inside the plastic case. The cantilever cover was still in place and the cantilever is straight, but doesn’t it seem like not a great idea to keep a cartridge that was rattling around for 4000 miles? The sharp edges of the cartridge body put hundreds of tiny nicks all over the inside of the case.

I'm going to return the cartridge.  No sense in risking there being unseen damage or wear to it.  Surely banging around inside a fairly big hard plastic case is not great for something so delicate that is built under microscope.  Disappointing to hear someone else had the same issue and amazing that AT doesn't tighten the nut a little more or put some Loctite on it!