Generally, I prefer the Series LLC. It was first created in 1996 in Delaware, over two decades ago.
Understanding the Series LLC is a great starting point for understanding DSTs. Both use a parent-child structure and have infinite scalability, offering creative solutions for investors.
California investors have special concerns because of the state's laws and tax regulations. While a Series LLC presents an ideal solution for investors in every other state, it would incur an $800 franchise tax at the very least.
The Delaware Statutory Trust is a great alternative, because it offers a similar level of protection to the Series LLC while also avoiding this tax burden. The state views DSTs as estate planning tools, which do not have to meet the same requirements as corporations or LLCs. Any investor who is doing business in California may be subject to state taxes.
One thing to watch when using trusts in addition to their protection afforded, is revocability. The DST is revocable which helps in adjusting for business conditions, where some trusts are irrevocable. That being said, it is best to look at the individual goals of the investor to decide whether to use a DST or LLC.