First of all, I want to start on an incredibly positive note - the work Chronicle has done with Jurassic Park is unmatched. What a time to be a fan and a collector.
The paint job on this bust is stunning, and incredibly detailed. I can't stop pouring over the details. However, as others have mentioned, it appears to be based upon the restored JP rex paint job that happened some time after Jurassic Park... the colors are lighter, and the paint patterns are different.
While they are similar, the differences are noticeable... Rexy is perhaps the most iconic character from the franchise, and as such, deviations from her design are all the more attention grabbing.
For this price, and scale, I hope the final prototype is tweaked to match the film accurate colors and patterns. While the overall response has been positive, the JP collecting communities have been caught up on this. For long time fans of the franchise, and big time collectors, the difference is quite jarring - despite its subtlety.
I really hope this isn't taken too negatively - again, the artistry on this piece is unmatched! It just needs some tweaks to truly represent the queen of Isla Nublar!