Awesome! I've gone to the wiki before but hadn't realized there's one on this topic. I don't have much experience with this type of material so this will be helpful. Thanks Eric!
Hi Eric! This is a bug and we're really thankful you reported it! You are absolutely correct that they should have Behave identically, we´ll get right on fixing it!
As @Eric Chadwick said there is Z-fighting with the plastic but apart from that, this is a great little piece :D Nice attention to detail and it brings back some good memories! ^_^