Hello from an Air France passenger who finds the seats hard and uncomfortable in Premium Economy.
(BUE-PAR-BUE - Boeing 777, 13 hs. flight). So, although same airline, this IS a different route and a different airplane ....
Love their Business class, and yes, I was somewhat disappointed with Prem. Eco, which has only 2 advantages IMO: legroom and baggage allowance.
For my last trip, I bought an Economy ticket plus the options of "Siège plus" (exit row or 1st row, for extra legroom) and the allowance for an additional suitcase on the return flight
One option cost 70 Euros, the other 100 US.
Saved me over 1,000 US in my case, which I'd rather spend shopping in Europe!
Now, if / when I'm able & willing to splurge, I don't hesitate to fly their Business Class.