You can succeed with either a bypass or sleeve with PCOS...
The weight loss will likely be speedier with a bypass. Sleeved women with PCOS tend to lose at a painfully slow rate, especially if revising from some other procedure to a sleeve.
You can reach your goal weight with a sleeve. Other sleeved women with PCOS have gotten to goal. Just be warned that the rate of weight loss may be slower than average.
Also, revision patients tend to lose more slowly than first-time bariatric surgery patients overall. This is because a revision patient's body has already dealt with the metabolic shock of a previous bariatric surgical procedure.
