the federals are a happy compromise, they are harder wearing than R888 and run slightly quieter as well whilst still providing probably around 75-80% of the dry grip of R888's
both are fairly adequate in the wet, but the federals hold up better with standing water.
overall I rate the federals for road use but they are no where near as grippy on track I found when compared to medium compound 'GG' R888's
plus theres the tread issue where the federals split across the section and the tread peels off, mine haven't done this as yet but the signs on the tread are there, a lateral sort of groove/peel line across the tread on them