I'm user of PDMS and smartplant 3D, and in general the use of them don't depends of which is better, it depens tha price and the contrat to adquire the licences, how you negociate with Integraph and/or aveva. In this case i think that integraph is much better, definitly they offer better price and lifecycle plant product.
Somethings appear cheaper up front, but in the long run, end up costing you more.
Somethings appear cheaper up front, but in the long run, end up costing you more.