1. He's undefeated (you know what I mean), granted MM lost fights at a weight class in which he was a lot smaller. 2. He is in a more talent stacked weight class (across all organisations and across the world LHW has more fighters). Contrary to what some MM fans on Sherdog have been saying there are actually more fighters at LHW than at FTW according to the tapology website with 574 to 462 across the globe https://www.tapology.com/rankings/groups/current. There are also more people in general around the LHW height (in the USA at least) https://www2.census.gov/library/publications/2010/compendia/statab/130ed/tables/11s0205.pdf. 3. He is the more incredible fighter to watch. MM is highly entertaining but Jones is unlike anything else I've ever seen. His fighting is violent and unpredictable and is expressed through a bodily mechanics that is simply freakish. This is probably the biggest point I can make. Some suggest Mayweather is not the GOAT because of the way he fights, and whilst MM is an entertaining and unbelievably skilled fighter, he does not excite nor express combat in the same way Jones does. When you're watching Jones you are watching art. This is a very legitimate reason to suggest why one fighter is better when their records are within close proximity of each other. 4.MM is a more complete fighter but not by much. One of the biggest criticisms of Jon is his boxing, but watch the Glover fight and you will notice that he certainly "can" box but usually opts not to. Only the boxing and the BJJ of Jones "could" be said to be below that of MM, whilst every other skill is either level with or beyond MM. 5. Bigger threat of knockouts at LHW than FTW, meaning less margin for error. This point is pretty obvious. Yes there is the PEDS issue with Jon that looms over him but I think that is overstated for two reasons. Firstly, Jon is a skill based fighter with incredible physical attributes, he is not a strength based fighter or a knockout artist (He is also not "big" and when he was "bigger" against OSP he fought worse). Secondly, many of the guys who he destroyed were known steroid users and judging by their bodies were on way more stuff than Jon (if he was indeed on stuff). This is not something MM has really had to deal with. Roids or no Roids Jon is a different animal to everyone else. Lastly, it's perfectly fine and reasonable to say MM is the GOAT but saying you're only a true MMA fan if you think MM is the GOAT is ridiculous. We're entitled to choose favourites especially when you take into account fighting style and other basic facts.