All strains require different feed levels.
Some are so close you never will notice.
What your finding, is that these need a little less. I suggest you cut the nutrient your adding to water for a feed solution, down by 25% and try that..
See how they react and adjust again if needed...
This is called dialing in. You dial in your feed to the strain....You should have a notebook and be recording these things.....Once you find your dial in for this strain. It will be in that notebook forever.
Easy to refer back to in the future.
Good luck......BTW. They don't look that bad. The N looks a bit high in some pictures.....Hence the overall lowering of nutrient in the mix..