WS comparison: Indoor chard WAY more advanced even though sowed a week later

Huge difference so far between the WS chard March 7th, and the indoor-raised chard March 13th.  The WS chard started appearing a week or so ago, still tiny, just starting to get first true leaves.  The indoor-raised chard is lush and thriving with 1"-2" leaves.  I've taken to re-hardening off the indoor-raised chard lately.

Will be interesting to see if the WS chard catches up.