I don't have a strong preference. I've read that KKR is better suited for low rate environments and APO for high rate environments, so would expect KKR to perform a bit better if/when rates get cut. Also, I follow a few hedge funds (1 Main, Greenhaven, etc.) that are long KKR. Lastly, I thought that S&P 500 index inclusion would be a catalyst for KKR (which ended up materializing and resulting in a nice pop in share price).
I'd love to own APO at the right price...we'll see if the market affords me that opportunity.