analyzer is very good, colour matching works well enough but sometimes tools designed for a particular job are more suitable.
In this case I point out that Hugin is mature software designed to create panoramas or geometry alteration and does a good job of colour blending. Out of curiosity I tried it on your example, essentially a quick try on defaults, I couldn't see the join.
Like so many things, learning how to drive it well takes practice.
Those are quite tricky images with the sky close to burning out and polorisation is probably taking place on the grass, hence the slightly strange look. Maybe a retake using a polariser on the lens would help, although ideal light conditions are rare for panoramas.
I have no connection with the software. Non commercial open source.
I hope our host will forgive mentioning outside packages.