Been trying to find that magic diff that will give me the mid corner speed of a oneway and stability of a spool. Who would have thought that the car can still turn with a solid front diff? I use spool for asphalt and tried oneways, but I need that stability when fighting for a corner to take different lines. I feel oneways force you to take one particular line through a corner. It is fast, but comes with a price.
Spools have the best on power steering of them. The front tires will pull the chassis forward to a point that it will try to straighten out by the means of swinging out the rear. This results in a controlled oversteer that almost never spin out. I find oneways good on a sweeping track and spool for those tight technical ones.