compares more to a 28 yr old Justin Williams.
28 year old Justin Williams had already been a major driver for a Stanley Cup run, and had seasons of 76 and 67 points. Coleman has 94 career points and has played in 5 playoff games. Those two are not comparable at all.
.Coleman is the better player and by a good margin
I can see the argument that you value Coleman's intangibles to Toffoli's scoring, but saying he is better by a good margin is just hyperbole.
Coleman is currently on pace to have a career season, scoring at a .54 points per game, which is .14 higher than his career average of .4 PPG. Toffoli's career PPG is .56 and he has seasons of .71 and .64 PPG. Toffoli is a much more prolific scorer.
I don't know if you are an analytics person, but they also favor Toffoli by a pretty significant margin. By CF, SCF, HDCF, and xGF he is better than Coleman, same by Rel.
Again, Coleman is a high motor player and that has value, that may even make up for the gaps in scoring/possession between the two, but to say he is significantly better is ridiculous.