I would add how you are using them?
Having used both they will give very simalar effects but the antique gives the same look if no block out has been used it adds color and darkens the groves, so for adding color to the leather and geting a dark groove look to it hi liter is better much better for that but using a block out and then antiquing use the Tandy antique for that. That's why I ask how your using them.
Josh