Killer,
The ramps can have any variation that the cam designer designs into the cam. With the 0.020" used by Mother on the slant cams may have been done to reduce the chance of burned exh valves from careless lash adjustment.
If you are referring in general terms when you say a bit loose [ lash ] is infinitely better, no it wouldn't be. While too tight & too loose can both have issues, too loose can have the lifter crashing into the flank of the lobe which is harsh on the valve train & causes stress.
