dynamics, during its 2.5 years of production (it made its debut after Jan. 1st. 1968) only 19,134 cars were produced. 1968 = 6,725, 1969 = 8,293, and
1970 = 4,116. How that compares to the Crossfire, I'd have to say less than 1/3.
A few years ago, they were worth more to part out, but not anymore. 1970's bring the most money.
Besides the statistical resemblance that I mentioned at the start of this thread, I've noticed a few more similarities during my time with the Crossfire. Or as some may say, "the 6 degrees of separation between the Crossfire and the AMX".

Side glass misalignment. Some AMXs came from the factory with side windows that didn't fit very well. (now where have we heard that before?)
Tire clearance. Even with E-70-14 tires it was possible to see rub marks on the edges of the fenders.
Leaking Automatic trans. The infamous "Borg Warner" would weep on the dealers showroom floor. Unfortunately, it wasn't a simple 0-ring fix like the Crossfire.
Sloppy manual shifter, vs the XF's notchy 6 spd. Was later rectified by Hurst shifters.
Wing style spoiler. AMC offered a dealer installed "wing type" spoiler for the AMX.
Controversial spare tire or lack there of. The AMX was the first American Sports car to offer the BFG "cutting edge design" space saver tire and it's "can" of air, vs Crossfires no spare, air pump, and "can" of sealant.
Being derived from another vehicle. Where the Crossfire owes its beginnings to the SLK, the AMX sprang from a shortened Javelin chassis.
Both manufactures were involved in either a merger or buyout with Chrysler.
Both cars very closely resemble their factory "Show Car" edition.
After market performance parts availability was and is both limited, and expensive.
Limited production. 3 model years for the AMX vs 5 for the Crossfire.
The AMX started production as a 1968 model, the Crossfire ended it's production as a 2008 model.
Both cars used vacuum operated accessories, which could fail due to leakage.
Traction control vs traction bars, (I know it's stretch, but it created similar results).
Finally, a loyal, almost "cult like" following.
As dobro pointed out, old cars are indeed cooler, but new cars are definitely better. I'm just glad that the old saying, "what goes around, comes around" rings true in this case.