Both Sealed Power / Speed Pro and Clevite offer "Performance" bearings and "Race" bearings. Irrespective of the chamfered or narrowed design for cranks w/ radiused journals, where do the "Race" bearings show an advantage?

Is there a HP level where you'd say the "Performance" bearings are no longer acceptable because of some particular characteristic? Are the "Race" bearings less acceptable for a street-driven application?

I'm no bearing engineer, so it's just me asking more questions.