I like the chart, but bear in mind, that is for one specific model at one time. For example, a bunch of the RRA's have the M4 feed ramps. Maybe that one did not, but numerous other models did or do now. Of course, for decades, folks put millions of rounds down range without issue thru AR-15's and semi fired M-16's during a time in which no one even knew about M4 ramps.
Further, a number of the items listed - MPI for one - will be done by actual gov. contractors because they are required to do so under various contracts. Not saying thats good or bad, but when one can spread the cost over millions of units, its a bit different that spreading it over say 3K or 10K units a year. Tons of high end, well respected weapons are built with components that are not MPI'ed.
Additionally, the features selected in the chart are somewhat subjective. Higher end units with SS barrels, for example, will not be chrome lined, so on a chart like this, it appears they are lacking, when in fact, they may be actually better. Similarly, for accuracy issues, some shooters avoid chrome lined barrels. Again, the chart would suggest lacking when reality may be different. Same with 5.56 chamber. I have and would pay extra to avoid a 5.56 chamber.
Overall, looking at pre-election pricing, one generally gets what one pays for. Only exception might be the "hot" item of the day in which there is a supply/demand imbalance. Basically, no free lunch or "its just like a Sony, it has Sony guts" issues where one can save significantly. The consumers truly driving this bus (pre-election) where generally well informed, and the pricing generally reflected the manner in which things were valued in the market.
Colts in particular command a premium based upon name/history. Plus, the fit and finish is excellent. If buying a shooter, perhaps its not worth the premium relative to other quality weapons. If buying as an investment, maybe it is a solid selection.