Espruino vs. All

I ask some help to understand the substantial differences between Espruino:

• vs. DukTape/low.js
  
• vs. JerryScript/IoT.js
  
• vs. mjs/Mongoose
  (or vs. other embedded Js engine?)
  
  
  

1. Is there a comparative to evaluate pro/contro ? (scenario is
   pro/semi-pro. We are testing esp32 with LoRawan & modbus but we can change mcu. We would like have also profibus but this is another issue)
   
2. Is there a ecosystem around Espruino like ClearBlade or
   other iot infrastructures ? (or... does Espruino has partnerships with other system or consortium ?)
   
   

Many Thanks
MrB

P.S.
It is not a race on who is stronger!
I would just like to understand better... ;)