Even the tax treatment. So you get return of capital that's "tax free". But in under 10 years that cost basis goes down to 0 so you automatically get taxed on it. So if you're still working in 10 years will be taxed... and total return for qqq is actually higher than qqqi despite that fat dividend.
I think the best long term investment is combination of qqq, qqqi, and qld. Holding everything in qqqi means I would miss out on gains. But holding only qqq means when I am ready to retire I will have to start selling 10% even when the market is down. Qqq should be sold preferentially at market tops like now. Qld is another thing to buy during market bottom and never sell until retirement. All of these can be held for 20years, unlike goog and amzn which underperformed over the last 5 years. Any single company like nvda eventually will stop growing.