I took my car in for an oil change. In the process, the dealer managed to back my car into/against something and broke one of the clips holing the front bumper on. It was hanging loose afterwards. They replaced the clip, but then I noticed that they also caused a large scratch on the front bumper. I've attached pictures below. They were of course very apologetic and have owned the mistake and have assured me that they will fix it. They have offered to either fix the original bumper at a body shop, or to replace the bumper. I initially asked them to replace the bumper under the assurance that it was a new part as well as a genuine subaru part, which they agreed to.
They later called me and told me that the manager thinks that the repair would actually be better if I had the original bumper fixed instead. He said he was confident that it could be fixed so that I wouldn't be able to tell that it had happened. He also said that if I have the new bumper installed, it may not match because the bumpers are fitted at the factory and the tolerances might be different, resulting in a different and potentially worse fit. They've offered to still replace the bumper afterwards if I am not happy with the result.
The car is only a year old and I would like to see the best possible repair. I told them I would think about it and get back to them on Monday with my decision. What is the best option, and why? Are there any questions I should be asking at this point? Thanks in advance for any help on this, it's a very stressful situation and I just want to get my car back like it was.
Note that this is the front bumper, driver side.