BTW I never said there was a
HUGE difference betweeen J & F just that "F is quite a step up" - and it is. In contrast I have Flown SQ Suites a few times & I still prefer that - I found the service impeccable - something I fear EY will never quite achieve.
I found the EY J lounge quite average. Crowded, poor food choices & with somewhat poor seating arrangements too. I certainly believe all of theses issues would be alleviated in the F lounge..

I think we agree 100% NoY.

I guess the difference between "quite a step up" and "HUGE" is in the eye of the beholder. I was just trying to tell the OP that F class is worth it.
I'm still waiting for the opportunity to fly SQ Suites.