.small-margin {
    margin-top: 20px;
}

.big-margin {
    margin-top: 110px;
}


 <div class="navbar small-margin">
        <div class="navbar-inner">
            <div class="pull-right">
                <ul class="nav">
                    <li><a href="#">link 1</a></li>
                    <li><a href="#">link 2</a></li>
                </ul>
            </div>
        </div>
    </div>
    <div class="clear"></div>
    <div class="navbar big-margin">
        <div class="navbar-inner">
            <div class="pull-right">
                <ul class="nav">
                    <li><a href="#">another link 1</a></li>
                    <li><a href="#">another link 2</a></li>
                </ul>
            </div>
        </div>
    </div>