That is a helpful comparison, but it assumes the same initial contribution. I think a better comparison would assume a higher initial contribution with a traditional IRA in order to account for the money being paid in taxes with Roth as being a missed opportunity. The money that went to taxes in the case of a Roth could have been additional investment in the the case of a traditional.
I understand how having a higher income and tax rate in retirement makes a Roth attractive. However, the comparisons I’ve seen don’t fully account for the opportunity cost of paying the taxes up front in the case of a Roth, since a traditional IRA lowers your taxable income by the amount you contribute. This tax break allows for a greater contribution. In other words, I think a fairer comparison would show a greater initial contribution for a traditional IRA.