We rent both 1 and 2br, as there are many different tenants.
Historically, price per sqft on the 1br is higher than on a 2br, and a 2br can be rented for more.
So, if ROI is working for you, I'd say 2br is a better investment.
However, this depends on what you can afford to buy as well.
So, do your best in the context of your life - and make sure that you have a
great professional realtor on your side!
Hope this helps,
Beachfront Realty, Inc.