Identificaciones de mwoodamc

This was the spot that made me wonder if there are actually two species of white trillium along this trail. Alternatively, they could all be the same species with just one flower being larger due to microclimate and other site conditions. They were growing on a forested rocky slope above a creek. Looking for input and if there is consensus that these may be two different species I can separate them out into two observations.

The smaller ones appear to be the white form of T. erectum, while the larger one could be T. simile, sweet white trillium. They are said to be very similar in appearance with T. simile being a bit larger and blooming slightly later, which would seem to fit the picture. I've read that they can be distinguished by smell but I didn't know that at the time and since they were growing on the other side of the creek from the trail they wouldn't have been accessible for sniffing anyway.