I have a Marmot Pulsar1P and its erected inner tent first, then outer tent over the top. No problem when its dry, but was difficult when I tried to erect when it was raining. My inner sleeping area became wet very quickly! A real pain!
Problem solved when I bought the tents footprint! It fits perfectly, if raining, I can now secure the outer tent to the footprint first, then I get under the outer tent in the dry and fit the inner tent. OK, I accept its a bit of a wiggle to do it this way but the important thing is that it WORKS!
My other tent is a Zoryphos 1 which has its inner tent already fitted, that's the other option. It also works but the tent is not as good as my Marmot, not enough internal space.
I do not know either of these tents but I can say from personal experience its not so good when you arrive on a site in the pouring rain, keeping everything dry, for me, is a priority!