So, rent will be $2.5k. I'm guessing you don't pay for water, gas, heat and trash separately, right?
Owning will be ~$3k. Does that include the HOA fee of $650? What maintenance expenses would you expect other than for things affecting the interior of your condo? Will you occasionally get assessed for common area items?
From the figures provided, it appears you will be paying more out of pocket to own. You will get another bathroom but you will also have the responsibility for maintenance, at least on the interior. Generally speaking, you should budget 1% of the value in maintenance each year ($4500 in your case/$375/mo) but that may be too high if there are a lot of maintenance costs already built into the HOA fee. Even so if you cut the maintenance cost to $200/mo, you're looking at $700/mo more to own.
ALSO, that doesn't include the lost opportunity of investing 20% into the condo rather than the market. The market averages a 7% return. Most real estate values just keep up with inflation. Your area might be different, however. Try to research the long term increase in home values over the past 20-30 years and see what the annual return is there.
I cannot truly see any scenario in which buying would be more beneficial than renting. You will be tying up your down payment, taking on the responsibility for maintenance costs and paying more per month for PITI versus rent.