I would feed both colony's and leave them separate. Summertime often has intermittent dearths with some small maintenance flows. I don't like feeding but on small startup colony's its often good to insure their ready for winter.
I start some nucs in July and aug every year and overwinter in a single deep but I have to feed since they missed the spring flow.
I start some nucs in July and aug every year and overwinter in a single deep but I have to feed since they missed the spring flow.