At 62, I had your journey.
Went from 12 oz Dunlop200's to 10 oz 500's, but the ACTUAL SW of the 500 is more than it's advertised "308". 200 SW is about 340.
After a full year of using only the lighter racket, I spent 4 tries of 3 days each try using the old 200. Don't need more than 3 day trial because I hit OK right from the first hit with the 200's.
Conclusion?
I'll stick with the 500 for doubles up to 4.5, and all singles. I'm maybe 4.0.
For ambitous wishing, I could dream of using my 200's against 4.0+ doubles and singles guys, especially if they are hard hitters.
I hit better with the 200's.
I PLAY better with the 500's, by far.
And no, I never swing the same with both rackets, there IS a need for compensation going from one to another.