The different things in each calculator are showing you a bunch of different things.
In the "Roth IRA calculator", it is comparing what you would have in the end after contributing and withdrawing from a Roth IRA, with what you would have in the end with a taxable account (i.e. an investment outside of any IRAs).
In the "Traditional IRA calculator", the "IRA after taxes" shows you what you would have in the end after contributing and withdrawing from a pre-tax Traditional IRA. The "IRA before taxes" simply shows the same amount before you pay the taxes on withdrawal, which is not a useful number.
So if you want to compare Roth IRA vs. Traditional IRA, you want to compare the "Roth IRA" from the Roth IRA Calculator and the "IRA after taxes" from the Traditional IRA calculator, but there are some things you need to be aware of to make a fair comparison, because if you just plug in the same numbers you are going to get a very unfair comparison (it will look like Roth IRA is a lot "better" even though it's not). The Roth IRA contribution is after-tax, whereas a (pre-tax) Traditional IRA contribution is pre-tax, and an after-tax dollar is much more than a pre-tax dollar, so if you put in the same nominal contribution amount, you are actually contributing much "more" from your wallet in the Roth IRA case.
To make a fair comparison, you would need to start with the same pre-tax amount, and put in a Roth IRA contribution amount that corresponds to the equivalent amount after taxes. So for example, a $5000 pre-tax amount with 25% taxes is equivalent to $5000 * 0.75 = $3750, so you would put in $5000 for Traditional IRA contribution vs. $3750 for Roth IRA contribution. Note that if you have the same flat tax rate at contribution and at withdrawal, (pre-tax) Traditional IRA and Roth IRA are exactly the same, and you can see this by putting in 25% for the "Retirement tax rate" in the Traditional IRA calculator (we already assumed 25% tax rate for Roth IRA when calculating the contribution). You will see that Traditional IRA would be better in a lower retirement tax rate (e.g. 15%), whereas Roth IRA would be higher in a higher retirement tax rate.