cant really tell without looking at whole plant but this might help think of the buds become 25% the size then ask yourself is it worth pulling yet? if the answer is yes pull em :P hope this helps
its a mutant thats for sure just let it grow it looks pretty healthy and about pruning wait until later and u want to pruce leaves of the lower where they wont get much light so no energy is wasted on trying to grow bud on these and thin out the canopy so your buds grow fatter and so less light...