[Merkuri]

The differences you're seeing are because you're using different assemblers, I believe NASM and GASM. The opcodes are the same, it's different representation of the same data. AT&T is just more explicit about what's going on. Use gdb to disassemble the same code, you'll see that it's the same data being represented and that AT&T does the same things, just more explicitly. Same language, different flavours. Different architectures are harder to learn, different styles of the same architecture are only slightly different.

What I have said that the command are a little bit different and AT&T is harder for me by this. I'm using Emu8086 for the both.