Lumped capacitance slows down voltage transitions, while distributed capacitance delays the voltage transitions. This is shown in Figure 1, which compares 0pF, 50pF, 100pF, and 200pF lumped vs. distributed. The top graph shows the lumped capacitor, while the bottom graph shows the distributed cable. It is apparent that although the overall capacitance is the same, the response is different.
This is also the case when a clock is simulated with a 24ns period (42 MHz) with no load, while being driven with a 200pF capacitor and using a 2m cable with 200pF of capacitance, as seen in Figure 2 below. In this example, the top (no capacitance) and the bottom (2m cable with 200pF of capacitance) produce an identical, but delayed, response. To address the delayed response from the distributed cable, you can use the TDR feature of the Digital Pattern Instrument to compensate for the delays and display results in Digital Scope in the Digital Pattern Editor as if the cable were not present. A lumped capacitance (the middle signal) causes the signal to become distorted.