I've had a quick look on the manuals, if they are up to date then the difference is just the position of the heat exchanger (not the condenser).
There is a british supplier who I could get the Hailea from and obviously they have to honour any warranty.
For the difference in price, I think it's worth a punt.
At least the manual's in english.
To all intents and purposes, they are absolutely identical, I'm not prepared to believe that D-D make theirs here or Germany, they're from the same source in China, just rebadged