I dont think there would be much difference in the seat architacture between the Tekna and the Nconnecta. Maybe better materials, as long as there is lumbar support its all good. Heated seats are a given, you can add them as an extra.
You will find its only the seat covering thats different but, the foam cushioning remains the same. The N connecta is mid spec so expect lumbar support (not sure on lowertrims) though I don’t think its adjustable. Tekna trim adds Nissans advanced safety features, plus mainly extra cosmetic bits and bobs. Skoda Kamiq is one of its competitors!