Hey Ciaranse,
what's the EC of your watering water? The delta between watering water and drain only indicates how much fertilizer and salts are still being flushed out of the soil. However, since there's already a 0.2 difference between the two beauties and you're probably using the same watering water for both, I would recommend thoroughly flushing both pots with water - preferably with 0.4 EC - and then waiting another 4 days. That way, you've given them the 14 days without fertilizer that the rule of thumb suggests. And look forward to the Gorilla. 😋
Best, Wietje