I'm not sure it hugely matters. FWIW I suspect all ATs have their own entries in the PPP table, pointing to the specific powers that AT's allowed to choose, as part of the system's basic design.
Quite possibly the entries in the VEAT's section of the table point to exactly the same powers as the Brute's one.
Even if they do, though, if they ever decided they wanted to change the Brute powers and keep the VEAT ones as is it would probably be relatively easy for the devs to clone the current Brute powers and make the VEAT table point to those clones, then edit the ones the Brutes use.
Probably the only way you could tell how things work at the moment (short of a red name post) is if one of the Brute powers gets buggy (wrong animation, too much damage, wrong enh slottables, etc...) - if the VEAT version gets the exact same bug at the same time, yes, they're using the same power.
Are they directly tied to the Brute ones or do they just use identical ones? Meaning, if the Brute PPPs were changed, would it also result in a change for the VEAT PPPs for whatever reason, or not?