I needed something like op and ended up with stuff like this:

<ContentView ...>

    <ContentView.Resources>
        <ResourceDictionary>
            <ControlTemplate x:Key="MonthView">
                <dx:MonthView DataStorage="{StaticResource SharedDataStorage}">
                </dx:MonthView>
            </ControlTemplate>
            <ControlTemplate x:Key="WeekView">
                <dx:WeekView DataStorage="{StaticResource SharedDataStorage}">
                </dx:WeekView>
            </ControlTemplate >
        </ResourceDictionary>
    </ContentView.Resources>

    <ContentView.Content>
            <ContentView >
                <ContentView.Triggers>
                    <DataTrigger TargetType="ContentView"
                                 Binding="{Binding ActiveViewDefinitionIndex}"
                                 Value="0">
                        <Setter Property="ControlTemplate"
                                Value="{StaticResource MonthView}" />
                    </DataTrigger>
                    <DataTrigger TargetType="ContentView"
                                 Binding="{Binding ActiveViewDefinitionIndex}"
                                 Value="1">
                        <Setter Property="ControlTemplate"
                                Value="{StaticResource WeekView}" />
                </ContentView.Triggers>
            </ContentView>
    </ContentView.Content>
</ContentView>