I can't recall any extant comparison shots on teh InterWebz: there were some back in the olden days but I do believe they were taken down at some point.
I don't have any fully assembled HG gears on hand but a gaming buddy has used some of their feet on Tau battlesuits to replace the orginal "tippy toes" so they aren't exactly tiny. Also, their weapons would seem to fit 28mm scale human infantry minis fairly well IIRC (the same guy is going to retrofit some of gear guns on
Infinity remotes. I seem to recall the pre-Blitz ones looked a little small compared to the common "heroic scale" guns but the Blitz era weapons fit the general consensus that a scifi gun must be twice the size of a real world gun
