| It really is a case of yer pays yer money and makes yer choice.
A 998FE is basically a 998s with Ohlins forks and a slight variation on the paint job, i.e. no number borads on the seat unit. It has the same motor as the 999s (very similar to the 996r But I am not certain that they are identical) You don't get termis included though.
A 996r has some carbon bodywork and they can be bought from about £10k upwards. You should get termis and std pipes with the ECUs to suit included.
A 998r has the full 999cc motor the same as the 999r, the bodywork is carbon including the seat unit. The top fairing is not carbon. Again you should get termis and std pipes with the ECUs to suit included. A 998r can be bought for around £13k upwards.
The other thing with any R model is that Ducati say change the belts every 12 months or 6K miles whichever is the sooner. It can make servicing a bit more expensive if everything is done by the book.
Ray | 
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