Hello, I need to install an electric hot water tank at home and I am between two 80lts models, Sherman and Rheem. At the moment I see that the 2nd one is more expensive and a little bigger, which inclines me for the first one, since although the Rheem enters, half an awkward half where I will install it, and the Sherman enters looser. But looking at the specifications I see that the Rheem is heavier, therefore I think if the tank itself will be better, and on the other hand, it has several double insulation ads and all that, which I do not know if it is marketing and is the same than the other, if it really is better and consumes less energy by being better isolated. Do you know anything about it? If I buy the Sherman I screw up or is it the same as the other? (I saw that the first is the 2nd Rheem brand) Thank you. Regards.