Were both from seed? If so, that may be part of the reason, some strains are slower to show there sexuality than others when grown from seed. You may have triggered it before it was truly ready to flower? It may take that strain closer to 3 months than 2 to show it's preflowers and alternating nodes. I'm with DP, leave her be. Either she will start banging it out for ya, or you'll know to scrap the plant cause she's a pain in the keester. Either way we all learn something. Best of luck:thumbsup: