Even though you're growing the same plant with the same genetics each seed will have a slightly different genetic make up. Meaning not every plant will grow identical although they will all have similar traits, a bit like your brothers and sisters lol. And our children. You're hitting your 5 week mark which means potentially you could have a quick ripening trait (in your seed) and finish at the 8 week mark as suggested by the breeder. But don't worry, they plant will be ready when it's ready so many different variables between people's grow rooms and stuff. 🌱😁👍