Magento2 : Layout block what is the difference between acl=”” and aclResource”” attribute

I’ve been trying to figure out the difference between acl and aclResource both attributes available for <block> directive.

I know that aclResource is useful to render the block based on specific acl resource_id example :

<block name="my_block" aclResource="Some_Module::default">

see example in magento

I see that the same attribute is also used in blocks inside ui_components like following :

<uiComponent name="notification_area" aclResource="Magento_AdminNotification::show_list"/>

see example in magento

Now by looking at the XSD file of layout for block handle I see acl and aclResource for the block type

    <xs:complexType name="blockType" mixed="true">
        <xs:annotation>
            <xs:documentation>
        ....
        </xs:sequence>
        <xs:attribute type="elementNameType" name="name" use="optional"/>
        <xs:attribute type="blockClassType" name="class" use="optional"/>
        <xs:attribute type="elementAliasType" name="as" use="optional"/>
        <xs:attribute type="xs:string" name="template" use="optional"/>
        <xs:attribute type="elementPositionType" name="before" use="optional"/>
        <xs:attribute type="elementPositionType" name="after" use="optional"/>
        <xs:attribute type="elementOutputType" name="output" use="optional"/>
        <xs:attribute type="xs:string" name="acl" use="optional"/> <!-- here -->
        <xs:attribute type="xs:string" name="aclResource" use="optional"/>
        <xs:attribute type="xs:string" name="ifconfig" use="optional"/>
        <xs:attribute type="xs:string" name="group" use="optional" />
        <xs:attribute type="xs:boolean" name="cacheable" default="true" use="optional"/>
        <xs:attribute type="xs:int" name="ttl" use="optional"/>
    </xs:complexType>

by searching in magento core for usages of acl=" in blocks but only in customer_form.xml which is a form ui component.

<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
    <htmlContent name="orders_content">
        <block acl="Magento_Sales::actions_view" class="MagentoSalesBlockAdminhtmlCustomerOrdersTab" name="orders" />
    </htmlContent>
    <htmlContent name="cart_content">
        <block acl="Magento_Cart::manage" class="MagentoSalesBlockAdminhtmlShoppingCartsTab" name="cart"/>
    </htmlContent>
</form>

All that said, my question(s) is :
does acl and aclResource do the same ? is there any rule or best practice to use one above the other ? is acl deprecated ?