There really is no difference between a DWI or a DUI. The acronym for Driving While Influenced is DWI and the acronym for Driving Under the Influence is DUI. Both refer to driving a motor vehicle with Blood Alcohol Content (BAC) that exceeds the state law limit. Most state laws have a .08 BAC threshold limit, so if you are driving with blood alcohol content that is .08 or higher, you seriously risk getting convicted of a DWI or a DUI.
Each state handles DWI a little differently and your BAC will be a big determining factor regarding if your license gets suspended or immediately revoked. If you are pulled over while driving under the influence of alcohol, you will get arrested and a judge will then determine your fine and or sentence. Most states will not sentence you to jail time for your first offense, but if you have repeat DWI or DUI offenses you can expect to serve extended time in jail. It is highly probable that you will need DWI insurance even with only a single offense.
The Auto Insurance company is required by law to notify the DMV of any changes you make to your insurance policy. If you drop coverage below the legal requirements, if you cancel your policy, or if your policy is terminated by the Auto Insurance company, the insurance company will immediately notify the DMV and your license will then be suspended or revoked pending further review. It will not be reinstated until another SR-22 is once again filed on your behalf, either by the same insurance company or a different one.