Teardown by TronicsFix demonstrate the new coloured Dualsenses have thicker springs, going from 0.25mm in the old controllers to 0.3mm.
There's also a change to the analogue sticks, but it's unclear whether it's inconsequential/cosmetic or anything to do with addressing stick drift.
The all green analogue sticks is in the latest models.
I would assume these changes will eventually make it's way to the white, black and red models (it's probably already happened) but how you'd distinguish it from the old models on the box I wouldn't know.
There's also a change to the analogue sticks, but it's unclear whether it's inconsequential/cosmetic or anything to do with addressing stick drift.
The all green analogue sticks is in the latest models.
I would assume these changes will eventually make it's way to the white, black and red models (it's probably already happened) but how you'd distinguish it from the old models on the box I wouldn't know.