Here are some considerations:

- Modern homes tend to have large kitchens, bathrooms, and bedrooms, and open common areas. People may prefer this over the misc-rooms approach that's more common in older places.

- Old homes in the US may not have 3-pronged outlets

- Old homes may have faucets that don't stick out far enough to get your hands under. Ones in the UK may have separate faucets for hot and cold. (Is the intent to fill the basin? Rapidly move your hands between the two?) You're more likely to have touchy shower temp controls