Same thing at least according to Visible - FWA is but one of the offerings under the broader Verizon Home Internet moniker. It's a simple discount applied to Verizon Home Internet with a promo code from Visible (received mine several weeks ago via email but not available in my area). It could be 5G Home, LTE Home or even FIOS internet depending on availability in you area. The former two are considered "FWA". The discount is either $10 or $5 per month with auto-pay depending on which of the two Visible plans you have.
Note that the promo code appears on your account page