A vs A with helpers tag for controller?

C#
<a asp-controller="Race" asp-action="Details" asp-route-id="@race.Id" class="btn btn-sm btn-outline-secondary">View</a>
<a href="race/details/@race.Id" class="btn btn-sm btn-outline-secondary">View</a>

C#
<a asp-controller="Race" asp-action="Details" asp-route-id="@race.Id" class="btn btn-sm btn-outline-secondary">View</a>
<a href="race/details/@race.Id" class="btn btn-sm btn-outline-secondary">View</a>