Should I invest using StashAway or Syfe REIT+?

Stashaway. They have a balanced portfolio of commodities, bonds, equities based on your risk level. Fees are quite reasonable too. In uncertain market conditions like now, good to have a diversified portfolio although personally myself I do DIY on neither of the aforementioned 2 platforms.

It really depends on what the purpose of your investment is. If you're looking to add a satellite portfolio to your core portfolio, REITs can be an option. But if you don't have any core portfolio to begin with, StashAway will give you a broadly diversified portfolio within one product.