FRER vs Rapid Results Sensitivity

Does any one know the sensitivity levels of the FRER compared to the First Response Rapid Result? I tested with a FRER and got a very clear positive last night.. I followed with a Rapid Results test this afternoon and got a faint positive result. I have read different information online so I wasn't sure if anyone here might know the answer. Thank you in advance 😊 Baby Dust to ALL 👶🏼