First grow WW photo strategy question

First grow very small tent DWC. Due to failure to seedling I have 2 of the same strain 2 weeks apart. I have been shorting the older one on nuteds and keeping VDP low to help seedling but the older one is now showing a little stress. Pictures
Should I just split my lights up for a while and get the older one on it or just hold till they get closer? Do not want to damage older plant.

Grow em both in the same space, the smaller one may catch up, if it doesn’t, oh well, you’re overthinking it.

Keep them both as healthy as possible. Use lst to keep them the same height.