Resale homes have matrue landscasping, and you can evaluate the condiditon of the property. New homes will require investment in landscaping.
With resale neighborhoods you can see if the neighbors take care of their properties, leave 'stuff' out or not. With new homes you won't necessarily know ahead of time, but you might have a HOA to help monitor activities.
Resale homes may carry higher utility bills for the same size as a new home due to absence of efficiency windows and insulaiton.
Those houses, I think are better than new. You still need to make sure it was built to code and that there aren't inherent problems like a poor foundation etc.
New construction has the advantage of not having worn out systems, no personal touches, you can create whatever you want and it usually has longer warranties. They usually have smaller lots and homeowner's associations.
Older homes generally have larger yards, you may not have a homeowner's association, and you can usually get more house for your money (not always). In this market, new home builders are giving huge concessions.
It really is just personal preference.
1) New construction may not be the same quality as older homes
2) New construction ought to be up to date on the latest codes, better insulated, more efficient HVAC systems.
There are many advantages / disadvantages of either option...I would advise you get yourself a Realtor to show you both options for what you are pre-approved to buy, and judge for yourself the physical house, and most importantly the neighbourhood and how it all ties into your lifestyle and personal needs.
I guess the only other thing I would add is, do you enjoy fixing up homes, doing minor repairs. etc? If so, you might like the older homes. Lots of variables! Good luck with your search!
With an existing home you're buying a complete package plus you can see the finished neighborhood.
Some buyers really like new, some won't even consider it. Buyers tend to lean one way or the other early in the home buying process. As other have said, it's just a matter of taste.