I assume you're trying decide between purchasing a townhouse vs. a single family home. It really all depends on what type of lifestyle you're looking for and how much space you need. With a townhouse you have an HOA, who will take care of the lawn maintenance, snow removal, trash removal, may include a pool and a club house, etc. With a single family home, you get the space, privacy, the backyard and nobody tells you what to do and how to live.
There are pluses and minuses to both, but decided what type of lifestyle you're looking for and go from there.
If you need any help or have any questions, don't hesitate to contact me.