Those both look male to me. At 350g they should be about 5" and should be starting to show secondary sexual characteristics - and I would bet they are male! The second picture really is looking male the first one is not as easy to tell from the picture.
That's weird to me you guys think they are both males, they both look like females to me. The ansl scutes in both look like they are starting to round out.
I realise I didn’t update this post. I went to see the seller, put the tortoises in warm water and they were male indeed, they both showed it to me lol.
He seemed surprised about me asking for warm water to soak them, he apparently had neved done it...