Comparing shots on goal is pretty laughable given the amount of time Martin played up forward compared to Heppell. Martin is FWD/MID and Heppell is DEF/MID - its just what their respective teams need of them . That said i do agree that the next step forward for Heppell is to have more score involvements. However I think Heppell has more improvement in him than Martin - He's younger and he's shown a continual ability to keep improving year to year (really disciplined player who you can tell works hard to remedy any of his flaws each year). The idea that Martin has a lot of improvement in him seems based off hope more than anything - i think he will mature a bit but i don't think his onfield presence will change greatly. I've always regarded him as a very physically mature player from the moment he set foot on the field - those types don't typically have the same degree of improvement scope in them.
I don't think its clear cut who is better anyway so I have no problem with people preferring Martin's x-factor attributes to Heppell's consistency. It will be interesting to see how this comparison evolves in the next few years.
So is it pretty laughable to compare disposals and contested possessions given the amount of time Heppel played midfield compared to Martin?