I think its still too young to call it. I really can't see the tail in either pic, and that is usually a strong indicator.
Adult male sulcatas have very long tails. Easily 3 inches. Adult females have tiny little nubs for a tail. Just a 1/4 to 1/2 inch.What tail characteristics are more male or female? Just the length and opening shape? Compared to my definitely-male Hermanns, the tail is pretty short and no spike at the end, though the sulcata seems to carry the tail tightly tucked up to the side. Not like my Hermanns swinging the thing around all the time, haha. I can try to get more pics later.
Adult male sulcatas have very long tails. Easily 3 inches. Adult females have tiny little nubs for a tail. Just a 1/4 to 1/2 inch.
When they are juveniles, they all look sort of female-ish, but as maturity gets closer and the hormones start flowing, the males tails get bigger. Anal scute shape is another strong indicator, but that takes more time in most cases.
Many people, myself included, have prematurely declared a sulcata to be female, only to learn we wrong wrong months or years later. If its got a big tail, its a male. The tail never shrinks. If its got a small tail, it could be either a female, or an immature male.
I found a couple of pictures of my own tortoises on the internet that better illustrate the difference: Compare the tail in your pic to the tail to these two:Here's a pic of the tortoise's tail. It does seem a pinch long for a female, and the opening does resemble that of my male Hermann's... but this was also immediately before a poop. I suppose time will tell...