I found this site very convenient for doing a rough comparison of several of my phone screens.

I chose three different phones: an old Samsung Galaxy Note3, vivo y3s and a Moto 54g 5g and was quite surprised. I expected the Samsung to have the most vibrant colors but the Moto came first, Samsung second and the vivo a poor third.

Right, it's a rough and ready check but it's nice and practical.