"digiPortfolio on digiBank" vs. "digiPortfolio on iWealth" - what is the rationale for the segmentation?

If I understanding correctly - the former is running based on a selection of ETFs and only available to mass retail customers. The latter is based on selection of UTs and only available for priority tier (DBS Treasures) customers

I am wondering:
1. What is the customer USP for the UT version if you are offering the ETF version concurrently
2. What is the rationale/explanation to the priority tier customers on why they can't access the cheaper version?