From what I seeing the Jewel and the fluval have nothing in it except the make and price! Moorlands wasn't open so I couldn't see the Jewel which is a shame as I probably would've asked if I could leave a deposit on it ...
Juwel Rekord 800 are an excellent tank, much better than the Marina Style range- http/www.seapets.co.uk/products/aquarium-supplies/aquariums/juwel/juwel-rekord-aquariums/juwel-rekord-800-aquarium.html
I now have a Juwel Rekord 800 purchased for £125. I'm in the process of setting it up and all the details and pictures can be found under my thread 'guess what I got today'