Are the alcoholic beverages Scotch Plaid and Knuckle Head Rusty Nail same ingredients recipe?

There seems to be a misunderstanding in your question. "Scotch Plaid" and "Knuckle Head Rusty Nail" are not names of alcoholic beverages.

* Scotch Plaid refers to a pattern of fabric, not a drink.

* Knuckle Head Rusty Nail is not a known cocktail or alcoholic beverage.

A Rusty Nail is a classic cocktail made with:

* Scotch whisky

* Drambuie (a sweet, herbal liqueur)

It's possible you're thinking of a variation of the Rusty Nail or a different cocktail altogether. If you can provide more information about the drinks you're interested in, I can help you find the recipes.