It depends on the parts, but in larger scales, PE can be less useful. I actually think they are more suited to the smaller scales.PE is flat and some of the parts they replicate, brake likes, levers etc, should actually be round. This is ok in 72nd, well, I do actually use wire for brake lines now, but in larger scales might look wrong. You may also find that some of the things you are adding are not even included in 72nd PE sets.
I use 35th PE for armour as well as 72nd for aircraft and its easy to see what parts would be added if the armour set was for a smaller scale.
I have yet to use any of my 32nd PE sets, but will be later this year, so I will be able to judge better on the differences.
I am a Norfolk man and i glory in being so
On the bench: Airfix 1/72nd Harrier GR.3/Fujimi 1/72nd Ju 87D-3