The Grid's tag helper requires the column title to be set explicitly, so in that regard it works as intended.
As for a document that compares the tag helper and the Html helper, we don't have one at the moment. The Grid's tag helper documentation section contains information on basic configuration and features of the component, however, it is not as extensive as the Html helper's documentation. We will be improving that going forward.
If you face difficulties with a specific configuration of the Grid's tag helper, feel free to submit a support ticket, or open a thread on the forums and we will assist you further.
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