They are football farces nonetheless.
Thomas has averaged a damning 3.5 yards on 256 career carries. If the play is blocked for three yards, Thomas will get three, whereas Miller has a chance at 40 or 50. No matter what Thomas shows in practice, the game tape reveals a tentative, soft runner with ball security issues.
Miller isn't without his own weaknesses, but it's only a matter of time before his obvious talent edge leads to the starting job he believes is already his.