As of late, who knows.
Colt has been confusing with their "limited" releases over the past 4 or 5 years.
Like another poster said, they'll do a limited run (better get em fast!) and then release the same pistol again a year later. Sometimes it's identical, sometimes there's a slight change...almost like they run across parts in the warehouse, cobble together enough complete pistols to release as "limited" again.
A couple decades from now, the collector market will be very confusing.