Need advise on which backer board works best

[On one]

If it was a straight forward overboard(no ufh) it would still be Hardie 250 for me.
If it was UFH on top of an overboard, 10mm Marmox or Wedi

 

[Dumbo]

I like the jackoboard . I found delta a bit flexible when I used them

 

[On one]

I thought the covering on the Jackoboard was thinner and not as substantial as others?

 

[Tile Fix Direct]

Orbry board, nice and easy to use! Spankers and adhesive onto solid walls;
Orbry Board - https://www.tilefixdirect.com/product/Orbry-Insulated-Backer-Board#OB12-12

Orbry Spanker Expansion Fixing Dowels - https://www.tilefixdirect.com/product/Orbry-Spanker-Expansion-Fixing-Dowels#ALDWL90

 

[Ttt1601]

For me it's nmp on floors, xps on walls, as general rule, even with the extra labour of adding more timbers to give 300mm centers the ease of xps makes it worth it,

 

[Perry]

I have always used 10 mm Delta type board on floorboards over the last 15 years.