I think this hides/hints at a greater point, though. C# or Java is a technology choice (among many, such as which ORM to use or even whether to use an ORM at al

I think this hides/hints at a greater point, though. C# or Java is a technology choice (among many, such as which ORM to use or even whether to use an ORM at all). All technology choices have an impact, and, in my experience working with both of these and other languages, it's just as likely for two shops that chose the same programming language to have made enough other different technology choices to make the transition challenging.