In your interpretation, is their any difference between what you believe it says and if it said it without referencing charge at all? For example it didn't say it was a 'special charge' and if it just gave you an attack, rather than 'an attack normally allowed at the end of a charge'?
If their is no difference, do you have any explanation for why the charge term was used?
Attacks allowed at the end of a charge and available in Ultimate combat:Pounce, bull rush.
Attacks not allowed on a charge: ranged attacks, most combat maneuvers.
It is a way to limit what attacks you can make.
If it allowed "an attack" I could fire a bow, make any combat maneuver and so on. I couldn't make a pounce attack.
Now it allow Pummeling charge as it say:
Pummeling Charge (Combat)
Benefit: When using Pummeling Style, you can charge and make a Pummeling Style attack at the end of your charge as part of the charge action.
a attack specifically allowed at the end of a charge.
On the other hand it will not activate Rhino Hide as it require a charge attack, something that you aren't making.
Avoid insulting people.