These are not the same at all.
> 25% should be the goal
I think 70% should be the goal - why? Because I pulled it out of my ass. Do you have a sound financial explanation for this benchmark, because it sounds like arbitrary dick sizing.
60% of income on a mortgage in a relatively stable area without insane property taxes is likely a very prudent allocation of income, since you both have a good investment and a place to live. Spending 60% or even more of income on a mortgage may well be better than 25% on rent.
Another thing, 25% of income is very different at $30k then it is at $300k. This is something the budding personal finance advisor should understand.
> then you need roommates
Is that what you’re going to tell people in their 30s with kids?