Hi,
In terms of body shape, both look like females.
In the first, however, the pectoral rays are thicker and have more odontodes. I think it might be a male that was fed too well.
But it's always better to see for yourself. There are always optical illusions in photos. What you need to pay attention to is described there:
To distinguish the sexes of small hypostominae loricariids
Greetings
Elko