I've used heavy duty ("heavy duty") ones that were greased and sealed when manufactured, and I've used standard duty replacements with zerk fittings for greasing.
I haven't seen a difference one way or the other. The ones sold as heavy duty, however, were indeed heavier, beefier, thicker and more reinforced. So there's that, if you're prone to literally breaking them into pieces.
If it's just normal wear after 12 or so years... I'd just get whatever. If it's greasable, ok... cool.. just don't forget to lube it every once in a while. If not, ok too, it's designed that way, much like the OE parts, which in my experience usually last a good decade or better.