Peter Reid has sent me this image showing his version and the 'official' version of the Exo-Suit side-by-side.
The main difference, which you'll notice at first glance, is that it's a lot taller. The need to use robust ball and socket joints for the feet and leg joints looks to be the main reason for that, as the body appears to be much the same size.
There's plenty of greebling, much of it inspired by the original, as well as some cool features not present on it such as the flexi-hoses and wheel hub caps at the back, and lots of bits and pieces sticking out of the top, probably there to give the appearance of the model some balance.
Take a look, then let us know which you prefer...
Photo by ex-Brickset administrator Bluemoose.