Sukuk bonds

Good day tutor,

I am still trying to understand the difference between asset backed and asset based Sukuk. I referred to this page (https://www.investment-and-finance.net/islamic-finance/questions/what-is-the-difference-between-asset-backed-sukuk-and-asset-based-sukuk.html) and it said that under asset backed sukuk, Sukuk holders cannot recourse to the originator (recourse only to underlying assets).

On the other hand, it said that under asset based Sukuk, Sukuk holders can recourse to obligor (originator) if there is a shortfall in payments.

What is the difference between recourse to Obligor and recourse to underlying assets?

I also do not understand how an asset based Sukuk is riskier than a typical A-tranche of a securitisation if the Sukuk holders are guaranteed rental payments. (Maybe understanding the first part of my question will help me in this though..)