Was thinking the same.I think they both are same...
Biometrics correspondence letter is nothing but letter states that our biometrics havebeen received and valid till 10 years for temprary resident visas...
let me know what is BVL also
My GCKey profile metions that my biometrics are valid till March 6, 2030, but haven't received any update. Is this normal ? I've sent a webform and theyjust reply back with a generic message that my application is being processed.