<TabControl x:Name="TabControl" Height="90"  
            Style="{StaticResource TabControlStyle}"
            ItemsSource="{Binding Navigators}">    
</TabControl>

<Style x:Key="TabControlStyle" TargetType="{x:Type TabControl}">
    <Setter Property="OverridesDefaultStyle" Value="True"/>
    <Setter Property="SnapsToDevicePixels" Value="True"/>
    ...
    <Setter Property="ItemContainerStyle" Value="{StaticResource TabItemStyle}"/>
</Style>

<Style x:Key="TabItemStyle" TargetType="{x:Type TabItem}">
    <Style.Resources>
        <DataTemplate DataType="{x:Type vms:ProjectsNavigatorViewModel}">
            <TextBlock Text="{Binding RootNodeHeader}"/>
        </DataTemplate>
        
        <DataTemplate DataType="{x:Type vms:PersonsNavigatorViewModel}">
            <TextBlock Text="{Binding RootNodeHeader}"/>
        </DataTemplate>
    </Style.Resources>
</Style>

<Style.Triggers>
    <DataTrigger Binding="{Binding Path=Type}" Value="vms:ProjectsNavigatorViewModel">
        <Setter  Property="HeaderTemplate" Value="{StaticResource TabItemProjectsHeaderTemplate}"/>
        <Setter Property="ContentTemplate" Value="{StaticResource TabItemProjectsContentTemplate}"/>
    </DataTrigger>
</Style.Triggers>

<DataTrigger Binding="{Binding Path=Type}" Value="{x:Type vms:ProjectsNavigatorViewModel}">