According to Yahoo Finance analysis, retail REIT Simon Property Group (SPG) delivered a 58% five-year total return, significantly outperforming Realty Income's (O) 16%, even after SPG cut its dividend by 38% in 2020. SPG's Q1 2026 revenue surged 19% to $1.76 billion, with raised full-year FFO guidance, reinforcing its total-return advantage. While Realty Income offers a higher current yield of 5.5% compared to Simon's 4.3%, the analysis suggests Simon Property Group is the superior choice for Roth IRA accounts, where tax-free compounding prioritizes total return over yield advantage.