The OE crank in my Orbea was a SRAM Rival utilizing the adjusting collar. I used that the first year then I replaced it with a Force crank that utilizes a wave washer. About 4 years and 8k miles in from new, one of the bearings became gravel-ly feeling that was when I replaced the originals with the Enduros. I don't know the preload requirements of either bearing type other than I adjust the preload to the SRAM spec in the install manual. Also I can't give any insight on the (Enduro brand) longevity as I built another bike at the time I replaced bearings, and have ridden the new bike far more than the Orbea since.

I didn't give any thought to the drag caused by the bearing seals as my speed isn't affected by the crank bearing seals.