I was wondering what product would work best for my application. I need a web server interface to control several digital outputs connected to my board, and it needs to be as polished as it can be.

In the past I have extensively used ESP32 Dev boards with async web server and often used the integrated memory to save both html and image files to make the web server interface nicer. I was going to buy an ESP32 Dev board once again but then the uno R4 came out and now I am a bit confused on what to choose. In short, my questions are:

• can I load a source file alongside images and html files on the new uno like I did with the ESP32 (since from what I understand you could not do that in previous revisions of the uno)?
• can I use the uno R4's ESP32 GPIO pins alongside the ones already provided on the uno?
• is there any real advantage of the uno R4 over the ESP32 Dev board for the application I described? Thanks in advance and sorry if the question is ill posed, I am not really practical with some of the hardware concepts involved!