With Anschutz you get a nicer trigger and better finish and better/consistent quality. Across the product line. IMHO, the 455/457 is not the gun the 452/3 was. We can compare those. Probably get an angry response.
For accuracy, you could just as well ask is CZ worth the added price over a Ruger? All these comparison you are talking small numbers and probably need to look over several guns. I know the Ruger and CZ will vary. Another plus for Anschut is there is almost no lottery gamble. I had two of the same exact same Anshcutz and identical shooting. Did the same with two Ruger and it was like 2 different companies.
It also kinda depends who is doing the shooting. The "no difference" answers, might be suspect. Not seeing a difference, does not mean it was not there.
I have a silhouette Anschutz and that gun took me (a hack) to the next level hitting steel. That was all about trigger and stock. That gun predates the 2 lb trigger rule. I shoot for fun. Point is accuracy is a start. There can be more to a gun selection than accuracy. That other stuff cost money.