Loved my FF and most owners I know who have changed would still own theirs if the Lusso hadn't been launched.
The 612 is fantastic value and a great car to drive but by god it likes a drink and we are talking 10mpg in and around town and even less on a track but cruising on the Autostrada at around 100 it will return about 16 -17 dependant on right foot. Bullet proof engines and gearboxes as long as service has been done properly and not too many computers to go wrong. They must be right at the bottom of the curve now and can only go up in value but really high milers (60k +) and any lacking in service provenience will be hard to shift.
The FF is a revelation and for me it reminded me of the Scimitar GTE ( in appearance) which I adored as a car and as a concept (long time ago mind). I made the mistake of waiting too long to buy one, mine was a late 2015 and benefitted from quite a few subtle upgrades over the early 2012 cars. Not all of them appreciated like the rubbish DAB radio which never worked well due to the combined aerial interfering with both VHF and DAB so more often than not all you had was static. Best value ones are the late 2013 (Sept onwards) which had most of the software updates, slight gearbox update and a few extras came as standard by then. Fantastically quick and supremely comfortable on long haul trips. My fuel average was 18 mpg over my entire ownership with no issues at all. Best colours are the 3 layer reds, black and all the dark greys. TDF blue looks very smart with crema interior and the Diamond cut wheels cost 5k extra when new and have to be in perfect condition as they are well over 2k each to replace. Ferrari warranty is a must but if you buy from a F dealer you will most likely get a 2 year full warranty worth 6k. With the Lusso price holding up very well at 220k for nearly 2 year old examples the FF price has hardened in the last year.
The Lusso feels as if the FF has grown into a Swan and does everything and more with less fuss. Faster to 60 but smoother, more stable at near top speed due to better aero and ground effect, four wheel steer takes some getting used to but once you know how crisp the turn in is you just don't use so much wheel. Torque vectoring is greatly improved with 90% going to the wheel that needs it and fuel consumption is averaging 19+ with over 20 easily achieved on a run. Equal length headers, higher compression and precise balancing and matching of all the internal bits lets the engine noticeably spool up more quickly.
I drove the V12 Rapide a couple of years ago and it felt old fashioned, front end felt heavy, not nimble at all. the power delivery was adequate but not thrilling and the steering still suffered from the old problem of judder at low speeds on full lock. Plus at less than half price after 2 years tells its own story.
Sad thing is that if I had traded my QP for a GTS in black with black leather and Burr walnut dash and door inserts back in 2009 as I very nearly did I would have probably saved myself a lot of money.