Another difference I just thought of (which may have been what I was originally thinking of but I said it wrong.)
I think an advantage of a Roth is that you don't have to pay tax on the money you earn via investing. For example, if your money in a Roth doubles then you only need to pay tax on the half of it that was there when you added money to the fund. Whereas for a traditional 401k you pay tax on money as it comes out which includes money earned via the investment.
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Another difference I just thought of (which may have been what I was originally thinking of but I said it wrong.)
I think an advantage of a Roth is that you don't have to pay tax on the money you earn via investing. For example, if your money in a Roth doubles then you only need to pay tax on the half of it that was there when you added money to the fund. Whereas for a traditional 401k you pay tax on money as it comes out which includes money earned via the investment.