I would say yes, it's too late to top. As posted earlier, it's said you can top auto if you do it early. In my experience that makes them take an extra 1-3 weeks to finish. But I'm sure others have more experience with autos, as I've only grown a couple.Thing is, both are starting to flower now so is it too late to top?
Came here to say not to top an auto.Do not transplant and I wouldn't necessarily top an auto . You may stunt it's growth a tad bit . I have cash crop auto from cream of the crop seeds and did a test on it recently. The one I topped came back with 2 shoots but is much smaller than the other 2 !!!