There is a very crucial difference between a DUI arrest and a conviction, one that leads to very different consequences.
A DUI arrest is an allegation made by officers that they have facts supporting a guilty finding for driving under the influence. An arrest doesn’t mean that you have been found guilty, it simply means that officers feel that you were driving under the influence and it still remains to be proven. The law will presume you are innocent until you are proven guilty. If you are found guilty in a court of law by either an entered plea, a judge or jury trial, then you will be convicted of a DUI. Until that point, there is no conviction but merely an arrest.
The consequences also have stark differences. With a DUI arrest there is nothing on your record and you are not required to disclose this information to any institution or employer that asks about your criminal record. Remember, a DUI arrest is not on your record because you have not been found guilty of the alleged DUI.