help please

Hi all i have 2 plants both pineapple express autos about 2 days apart, 1 of them is thriving and the other 1 not so well,around 4-5 weeks old,the better 1 is around 14 n half inches tall the other only 10 n half, the right 1s leaves are a lighter green and more droopy and also top leaves are starting to yellow on the tips both in the same type of soil light moss mix 50/50 with perlite,18/6hrs light feeding them ph balanced water and around 18-20 inches from light, i have the right 1 raised, under a 250w.
am i doing something wrong or am i being paranoid??
any help would be great
thanks in advance

Both plants look good to me, very healthy. I see both have the yellow tip thing, the left on not as many leaves but it's still there. The only info I could find or think of was Mg or Zinc def. If your feeding lightly we can rule out nute burn on the tips and it doesn't really look like it anyways. If it gets worse on the new growth I would worry about it more but for now it's not bad at all.

they look good. let it dry out a bit and give both a good watering until a little runoff. collect runoff for both and check ph. Not knowing your soil mix or nutrients used I would make sure ph is good before attempting to remedy anything. most deficiencies are actually caused by lockouts due to improper ph

plants are good man...they grow at different rates doesn't have anything to do with growing conditions nessaceraly....in your case this is the case because both plants look really healthy...keep growing man your doing fine-)

Cheers for advice guys i starved the drooping 1 for a day now lightly feeding it and it seems to be perking up a bit.
the 1 on the left is doing great and now stopping it vertical growth and started budding checked the ph in both and the right 1s ph balance is between 6-6.5 so should be all good.
thanks again and il keep you updated of growth

these are fine newbie plants

They both look great. They don't look like yellowing at all lol also the first one looks like it's been flowering for about 2 weeks that's why it's taller

I think the yellowing was light burn on the tips of the top leaves as its not spreading or anything since i moved the light up.and yh left 1 started budding around new yrs day and just stopping its vertical grow so gunna start nutes on it soon

The right 1 started to liven up a little bit but has gone droopy again