If you want to use a 90/10 you can but something for a more typical portfolio or a way to adjust the buckets seems to be a more common practice. One reason is if a person visits a site and just sees returns from a 90/10, that would be misleading if this person needs a totally different portfolio with a different risk profile (maybe someone a bit older who needs a 60/40). More text can help clarify what is going on.

I clicked on the Acorns portfolio and it's not even technically 90/10. It's 30% real estate - it's biggest holding. This isn't your fault as many people can and do call REITs stocks because of them being traded on stock exchanges. But really they are trusts investing in real estate. So if someone already owns or is about to buy real estate and they want to diversity their other future savings into stocks and bonds, then calling REITs stocks is not helpful.

Quote from Vanguard REIT website: "Appropriate for helping diversify the risks of stocks and bonds in a portfolio." If REITs are stocks how are they appropriate to help diversify the risk of stocks....Can be confusing to someone new to investing. https://personal.vanguard.com/us/funds/snapshot?FundIntExt=I...

One more thing to keep an eye on is how you show returns if you are going to. Averaging annual returns or annualized returns can be tricky.

For example. If the last three years returns are 8%, 8% and 8%. Are the average returns 8% or 8.7%?

This gets more extreme with real numbers as just in the last 10 years stocks have been as low -37% and as high as +32%. Whats the average return for these years -2.5% or -8.4%. Big difference.

Just to be clear I think it's OK to compare products side by side and show historical returns. But I would be really careful that you're disclosing the necessary information and making sure you are comparing the same things apples to apples.