Please can you justify your use of "significantly better". A 3.8 percentage point increaes in ROT and a 0.8 percentage point increase in S/R does not qualify as significant in my book. the dictionary defines significant as 1. having or likely to have a major effect; or 2. fairly large in amount or quantity. i don't think either increase qualifys defined like this and could easy be result of chance.
Thank you. Winston.