Compare the code yourself (should be an easy comparison)
bootstrap alert widget
angular UI version https://github.com/angular-ui/bootstrap/blob/master/src/aler...
strap version https://github.com/mgcrea/angular-strap/blob/master/src/dire...
angular UI version https://github.com/angular-ui/bootstrap/blob/master/src/aler...
strap version https://github.com/mgcrea/angular-strap/blob/master/src/dire...