I will say this: I used Valspar ancient ruins stone (about $10) on my first tank and then the Rustoleum version (about $5) on the second; and the Valspar has more flecking and speckles, the Rustoleum is smoother looking and less speckling. I think the Valspar looks far better.
Do you still get much reflection afterwards? It's mainly the mirror-like effect that bugs me at them moment.