I see the point you are trying to make but do you not see that people don't value them the same for redraft and with respect to trying win now don't you see why that matters? And FWIW last year I rarely saw JuJu go over Julio last year, was close but rarely saw him go ahead of Julio. Ben's now 38, coming off a major surgery and the question of if JuJu can operate without AB taking away the attention still hangs over a lot of people. So whether you think they are the same or not this year that's not the consensus.
So yea, JuJu might be better then Julio next season, won't shock many people, but right now that's not what people are banking on when they are drafting and it's not what I think is going go happen either. To be clear I think Julio is the better play next year but not so much that you sacrifice the massive age gap. That's not even close. But it still stands that if the person did this trade to win now then Julio over JuJu helps that cause in my opinion and opinion of most people as the massive ADP gap suggests.
I don't even think you focused on the right parts of this trade to analyze the win now angle. My guess right now is the RB I can get at 1.1 has a bigger gap in scoring vs Bell then Julio has over JuJu.