I am unable to comment on the fitting arrangement. I do not have detailed knowledge of upgrades changes etc in hose fitting configurations. As far as I am aware there was "pre PRT" and "post PRT". More than that I cant comment. 
Similarly I can't comment on the materials of construction variation between models i.e. who built what where and when in the factory. Rover/China etc.
The previous response was around the use of silicone hoses and compatibility with various types of Antifreeze.
From my perspective I will seek out an antifreeze from a supplier such as Comma in future (there are others obviously) and I have no financial or technical association with Comma or any other for that matter.
There appears to be more than one type of OAT (OAT, HOAT etc) and I'm not about to get involved in that discussion on here. I am not a materials expert.

Have a look at Comma or Valvoline websites to be totally confused!
Eg Comma G30, G40, G48 in various options such as extreme etc. You need the data sheets to see what is what.
Alternatively stick with standard hoses and plug in your VRN to the search features on various manufacturers websites.
 

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