I do think that at low levels colt would probably blow PM out of the water, but I'm not sure that that necessarily carries over to high levels. The reason that I say that is because the base clock value on a gun stays the same and the value of damage tech stays proportionately the same as you level up, but clock tech and precision tech become much better at high levels. At low levels a PM with clock tech will be slower than a colt without it, but at high levels it will be faster.
I'm not necessarily saying that colt is bad at high levels, but I do think that we need to see how they compare at level 40 before we say for sure how good they are.