Gray v Adams, based purely on Championship data. I thought that would give us the most suitable comparison.
Gray in a Burnley team flying high, Adams at Birmingham, who for one season were flying high, less so the rest of the time.
Games played (always Gray 1st) 43 - 116
Av mins played 89 - 72 , all the following stats are totals divided by number of 90 minute periods played
Total Actions (any involvement) 44 (8 successful) - 56 (25 successful) a mind boggling difference.
Goals 0.59 - 0.36
Assists 0.14 - 0.11
Shots 2.51 - 2.51 On target 0.98 - 1.11
XG 0.44 - 0.31
Crosses 1.40 - 1.38 Accurate 0.38 - 0.42
Dribbles 4.78 - 5.54 Successful 1.78 - 2.83
There are other lesser stats, but based on the above there isn't much between them. One thing for Gray though, he did his on a Burnley team that was probably dominating games. Che Adams did his on a Birmingham team often afforded space to play in. Gray might be more potent in our situation. Adams probably a more suitable lone striker.
Editing for shit maths