Commingled trust funds vs. mutual funds
Commingled trust funds and mutual funds are both popular vehicles for retirement investing, but they're very different products. As mentioned, commingled trust funds are regulated by the OCC and mutual funds by the SEC.
That means commingled trust funds aren't required to have such extensive disclosures about risk and performance. So, you could be getting into a not-so-great investment without understanding the potential for losses.
On the other hand, this lack of regulatory control means commingled trust funds are often much cheaper because they're not required to meet the same stiff regulatory requirements as mutual funds.
The other big difference, of course, is that not everyone can invest in a commingled trust fund. They're only available to investors with specific retirement plans, generally employer-sponsored retirement plans. Mutual funds, on the other hand, can be invested in by anyone, regardless of their employer or employment status.