I would be interested to hear this too - Mr FM is very keen to try SQ and EK. We did fly F in EY a few years ago, the suites are fabulous and the food both on board and in the lounge in Abu Dhabi was very good as well. Service was much less consistent than Qantas - some legs very good others hmm. Price was good for what you got.
Can't give you first hand experience of EK F but have had quite a few flights in QF F on the A380 - and have nothing but praise for the package of service and facilities.
In March/April, as I've reported briefly in another thread, we had four flights in SQ Suites, so have a reasonable basis for comparison against QF.
Overall, we really enjoyed SQ and I would be happy to repeat at any time.
Comparison by components?
Service:
Quite different styles, so comes down to personal preference, I think. My partner was less than enthused by the SQ "kneeling to talk and serve" approach and prefers QF on that aspect. I was less bothered by the SQ style; it is a reflection of the culture.
Both versions, in our experience, are excellent.
Food:
On three of the four SQ flights, I thought that they shaded QF in this area. One breakfast was rather odd. However, the combination of Caviar and bubbles is a winner!
That said, we've never had anything less than excellent meals on QF, with particular points for the tasting menu on the flights on which it is offered.
Beverages:
My preoccupation is Champagne - and it's a tie, for me. Easily satisfied with the best of everything.
Both the QF Taittinger Comtes de Champagne, in its various vintages presented of late, and the SQ choice of Dom Perignon or Krug (what am I saying???) - the SQ offering of DP
AND Krug are a delight.
My partner's focus would be on the range of table wines - and there, on our experience to date, at least, SQ has a points win over QF. I was weaned off the Champagne briefly to try a small sample on a couple of the flights, while he did a much more serious tasting and we both gave the win to SQ.
Seating/Bedding:
I liked the ambience of the SQ Suites, particularly for novelty value, I suppose. Rather like travelling on a posh train a few decades ago - but with heaps better food, wine and entertainment options.
Again, for novelty value, the middle seats made up as a double Suite is very very pleasant.
I had the total indulgence of the "Cove Service" of one suite for relaxing and one for sleeping on each flight. (Partner didn't bother with that - but he joined me for dinner in my Suite while his was being converted, so had the same deal, in effect.)
Mind you, have had a similar service a couple of times on QF, when a light load led to the offer of making up a different bed while we had dinner together, so points all round on that one!
The SQ beds feel rather too firm at first - but are surprisingly comfortable for a few hours sleep.
QF wins by a small margin on bed comfort though, for me.
IFE:
Easy win for QF.
Much better range, and better IFE controls. Also like the fact that you can check your "Time to Destination" at any time on QF, just at a glance. (I know it's shown on the control handset on SQ but, for me, it was virtually unreadable.)
Temperature Control:
QF win, with individual control over air flow.
Lounges:
Well, who could say anything bad about the QFF offering in Melbourne or Sydney, including pre-flight spa. A winner.
SQ got off to a very poor start, with no F Lounge available in Melbourne, and a Cafe Vue voucher substituted. Not even in the race.
At CDG, the SQ offering was the Star Alliance F Lounge, which we had virtually to ourselves for several hours. Very helpful service and a pleasant place to relax and freshen up after an overnight flight (Showers in J Lounge downstairs but priority given to F passengers.). We didn't need much in the way of F&B but the offerings were adequate.
SQ in SIN, of course, is brilliant. I think the J Lounge is excellent. Have not actually tried the F Lounge, other than to walk through, but spent a lot of time, with two long transits, in the fabled Private Room. There were very few passengers there at any time, so it was an oasis of peace; the service was impeccable and proactive; the food very good.
In contrast with CDG Star Alliance lounge, we would probably have been in LHR T5 F had we been on QF.
I would take T5 F over CDG *A -
IF you didn't have to fly into or out of LHR to do that!
On Ground Service:
Perhaps not a fair comparison as we have P1 status with QF and almost invariably have had great service at all levels - check in, telephone advice, sorting out any in transit issues etc.
SQ did poorly on their telephone service pre-flight, to the extent where I almost cancelled the booking. Then the outgoing check in was a total muddle, and took way too long. Boarding was also poorly handled in the lead up but we were eventually taken in hand and given a personal escort past all the road blocks and so they did recover.
Similarly poor experiences in Paris, with a messy process for obtaining BPs which were not available at our initial check in point.
BUT - and I look forward to comparing this with EK - we had a dedicated gate at CDG. For four passengers! Slightly surreal, I must say.
So QF a winner on that, other than in SIN, for obvious reasons.
If I've missed anything that you are interested in, ask away!
It's embarrassingly indulgent, isn't it!