“DWI” stands for Driving While Intoxicated and “DUI” stands for Driving Under the Influence. The charges sound similar, but the difference actually pertains to age. In Texas, anyone under the age of 21 with alcohol in their system will be charged with a DUI. If you are over 21 and pulled over for drinking and driving, a DWI charge will be the result. Either way, anyone charged with a DUI or DWI needs a quality defense lawyer.