Which backend technology is easier to master?

Question

.NET

On which it will be easier and faster to write a backend for SPA (HTML + JS), the main task of which (SPA) is to query the database on the server, with a selection from the database, the rest of the calculations, based on the received data, SPA performs at the client. Previously, there was little experience in developing an application in Delphi + Firebird database. What will be easier to master JS + Node.js + related necessary technologies (framework) or JS + .Net Core + С#? Thanks to all who answered.

Answer 1

C# is both more powerful and easier in every way. Every time you choose JS, you choose all the pain of dynamic and at the same time loose typing.
Also, C# is developed by the same person who developed Delphi before.

Answer 2

Js + node.js + .. you don't have to learn another language

Answer 3

Asp net core web api + Entity framework core + Swashbuckle
You will have to read the guides, but it's worth it.