Concurred the high internode distance indicates low light levels tending to stretching but apart from that they look nice. The red stems on the plant on the left indicate a mild nutrient disorder, probably carried over from an earlier stage in growth, also she looks a little N starved. These symptoms may well result from other factors like maybe root development ,soil pH or ec.
A little fine tuning is in order but things look promising
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Indica with highest yields? Orange bud, big bud, FI, The Hog, Donkey Dick etc etc anything with big in the name, there are loads. They rarely produce the best bud though, as the plant gets fat the centre of the buds are isolated from the light so the quality is impaired.