Kaufberatung Standheizung Webasco or Ebersbächer

Hello together, I would like to have a heater installed for my Renault traffic, which I would like to convert to a camper van. I have received 2 offers from Bosch so far about 2,250.00€ (Ebersbächer) and 2,750, 00€ (Webasco). I would like to have the heater installed with an app taxes if possible, but I was told that it is not possible with the Ebersbächer. However, I have seen online that there is also an app for this. In addition, I find the prices a bit high. Sin d these are justified or are they usually cheaper? And what would you recommend me? LG Surfgirl