After 8 games, I think a clear pattern is emerging. Ice continues to start each game and plays 30% more minutes than Jana. Yet, I would posit that Jana is more impactful in games. I can't speak to any differences in practices but in actual games, here is what I refer to: Jana leads Ice in total rebounds 46 to 33, Jana has twice as many steals, and Jana leads in points 58 to 49. At the same time, Jana has less fouls 14 to 19, and less turnovers 9 to 12.
Thanks to the great analysis supplied by JRRRJ, we can also compare Ice and Jana on a "per 40 minutes" basis. When we do, the far greater positive contribution of Jana is even more clear: Jana out rebounds Ice 14.15 to 7.81, she gets 2 and a half times as many steals and out scores Ice by 17.85 to 11.6.
The only area where Ice greatly bests Jana is in assists but I think that is explained by being less aggressive when she gets the ball under the basket. When Jana gets such possessions, her mindset is to score, while Ice simply scores less and will often look to outlet the ball rather than taking it to the hoop.
My point is I hope clear, Jana simply contributes more to our winning than Ice and the actual in game statistics make that clear. With a quarter of the season in the books, I think we need to recognize her greater contribution and give her the majority of minutes rather than playing a back up role.