Can I swap sims (and, as a result, phone numbers) between my two Xfinity Mobile phones?

I have a Moto phone that I bought from Xfinity, and an iPhone that I brought to Xfinity.

If I want to answer the phone number that "lives" on the Moto on the iPhone, from now on - can I just swap the sims?

(I haven't actually looked to be sure that the card sizes are the same, but if they are, does this work?)