Is the new iPhone X? The 2nd generation iPhone X?

They're basically very similar but the X? Has a faster processor and things?

I'm considering an upgrade to an iPhone X? Or X - I prefer my phone to have a large display and high resolution

Added (1). I currently use an iPhone 7 plus. Is it worth it to upgrade to an iPhone X?

Yes, iPhone Xs is the latest iPhone from apple. Usually Apple uses the 'S' phones to release the same exact phone with better specs and tiny bits of new features before dropping a whole new phone.

In a way yes but officially no. There's no 2nd generation of a specific iPhone model.

If you could afford the XS, then by all means.

Yes