They said he walked into the Hill fight at 235, and he looked fairly cut to me. I'm sure if he threw another 10 lbs of muscle and 10 lbs of fat on he would be a monster. No weight cut. Also him and Jones are both listed at 6'4" i believe, so not sure why he'd be "small". IIRC Jones has a 1" arm length advantage.
Jones no doubt has a big grappling/scrambling advantage, but his boxing has never been that great- i'd argue its his weakest fighting atribute. His kicks are great, and his fight IQ is remarkably great considering how stupid he is outside of the ring.
If Jones couldnt get him down it would be a super intriguing fight. Them trading different kicks, and Poatan setting traps. Jones can set traps too, but Poatan might just be better at an overall vision there, so they might not work and he could potentially flip that.
Both are up there in age.
Aspinal is much younger, and his speed and size is certainly a big challenge alone, not getting into how they match up striking- and thats leaving out the grappling.