I think the best way of trying is to move your entire portfolio to one lander for a 4-6 months period. Then try the other one. I'm saying this because all domains are unique and you never know which one will sell and when the market is slow/fast.
Just take my recent example, October 2022 was a decent month in sales and then November 2022 was the second worst month of this year. And December so far is going towards marking the worst month of this year. It's really surprising and frustrating at times. So you can't just use one platform in a short period of time and that too by dividing the portfolio into 3 parts...
Before I started Afternic landers, I made up my mind to give them a try for at least 6 months with a full portfolio and then decide whether to continue or not. After that, I've never looked back. The overall results are very good and I'm happy using Afternic landers.