I've flown the SQ F (777 first) last year and have an upcoming trip with the first leg in SQ F and the second in SQ R (A380 suites).
I cant comment on the R experience but F is probably the best I have flown where I have done EK F about 10 times (non-gamechanger) and 1 flight in JL F.
Best Pre-Boarding Experience - SQ, as the private entrance, private security and customs is amazing
Best Lounge - SQ, as the TPR is probably the best lounge in the world only for F&R passengers which is what JL should do in their upstairs section of the HND lounge. TPR has a private chef that made items off the menu and the wine list (think same experience as onboard)
TPR didn't serve business class lounge wines like EK where you have to hunt for F wines and J lounge in DXB has the Moet Chandon bar which serves better champagnes than the F lounge.
Best Wine List - EK (special mention to JL for the 1 bottle of 2013 Salon Champagne but then downgrade to something horrible after), EK' list is slightly better and load a lot of bottles incl Dom Perignon than SQ (1 bottle of Krug as per my experience) but only comparing this to 1 SQ F flight.
Best Menu - SQ with the book the cook but overall the standard F menus on the 3 we flew are pretty good
Best Service - SQ/ EK - equal, EK is very attentive and don't close the bar when starting decent and will ask you if you want anything additional and offer in a paper cup. EK will also meet you at the airport to escort to the lounge in DXB (with a buggy) if in transit and escorted upon arrival in MLE.
Best Seat - EK, the colour scheme and little areas of drinks and snacks is amazing
Best Bed - EK, very comfortable but cant say I slept on the SQ flight
Best Amenity Kit (incl. Pjs) - EK overall with bvlgari amenities (special mention to JL who have the best PJ's)
Best Bathroom (incl. Toilet) - EK (A380 has a shower which is hands down the winner)
I agree that more saver fare should be released and keen to see others take on how SQ compares?