Is it too Hot and too Slow

an led light should not get quite that hot maybe nutes ? also if the buds are not very hard it may be from the low watt lights when i used only 600w the buds were kind of airy but my buds under my 2400w and up are nice and hard

Hello, SPINNNN nailed it right on the head....

1 You will not have the bigger bud size possible if you dim the light , it will help the top not to burn but it will not bring enough light to the lower buds. Can you put the light higher ? If not can you bend the burning bud branch with a rope to get it less closer to the light ? 2 The reason why is : Genetic . Same strain , same name BUT differents seeds so differents plants AND EVEN if the strain is stabilised to be similar , similar does not mean identical so there will be slight variation between the individual of a same strain , the difference could be : a slower flowering or a faster one , a biggest yield or a lowest one , a variation in the smell / smoke / taste / after taste even if the overall is "similar" , some will needs more nutrients and some will burn with an average dosage. They are sisters , and like many sister they have things in common and things that are specific to each.

#1. Lift your light a bit or turn them down. It looks like heat damage. #2. Different phenotypes of the same strain. This is due to crossbreeding and dominant genetics(indica/Stativa/Ruderalis).

#1 yes I see a little light burn on the main top. You can dim your light. It wont really make your top buds much smaller at this point but light won't penetrate as deep into the canopy so the lower buds will be smaller. I would turn it down a little because the top buds are the best and you don't want to burn them up. #2 it is completely normal for plants of the same strain to be a little different. It is just different phenotypes in the genetics. Nothing to worry about. Good luck finishing up your grow!