I walked out of Porto in the pouring rain and it was miserable - and yes fairly industrial.
If I did it again I would spend an extra day in Porto (you must visit the Se Cathedral and the
Soares dos Reis National Art Museum in Porto.) Take a Taxi (18 km) out of Porto to Vilar do Pinheiro
and stay at the Santa Marinha Residential in small private room (35 Euros). One of the best meals I had in Portugal was at the little pink stucco wood-grill restaurant just a block away from the Hotel called Restaurante Delores. They have a traditional wood fire next to the vat of water used to reconstitute the salt cod just out the side door of the small intimate restaurant. Grilled Salt Cod was served with kale and potatoes - excellent olives!
Ancient Portuguese recipe for cod - very good meal. Chef Manuel was very friendly. Just an example for me as to why the Portuguese Route was flatter, the people friendlier, the food way better than my experience on the French Route the previous year. In Porto I stayed at the Poet's Inn which is directly on the Camino.