They both had a similar start towards the beginning of their careers, which makes sense considering they were both mentored around the same time by he whose name may not be mentioned. However, Rocky has always had much more versatility. He raps about superficial shit, but also gets deep at times. And sometimes connects superficial, materialistic concepts with introspective ones. I have yet to see Travis do that at the same level as Rocky. Rocky has better flow for the most part, better rhyme schemes, and punchlines. Travis' music is hella catchy, I'll give him that. But that's about it.