Midsoles: Which one brings the magic?
The base of these spikes is where we start to see the greatest difference between the Dragonflys and the MD-X. As seen on the MD-Xs, the full-length exposed carbon sole with the titanium, fixed spikes really adds to the wow factor. The Dragonflys have a ribbed spike plate, offering great traction on the track whilst providing lasting durability. Alongside the ability to remove the spikes on the Dragonflys, the two spikes couldn’t be any more different.
Both of these spikes use the leading foams of their respective brand. Nike use their tested and very successful Zoom X foam along with a thin layer of more durable CMP foam in the heel. New Balance use their super soft and light FuelCell foam, giving the spikes just the right balance of snappiness and comfort when paired with the carbon fibre plate underfoot. New Balance has made a trade-off when designing this shoe. Instead of going with the traditional replaceable spikes, they have integrated the titanium spikes into the carbon fibre soles of the shoes. This means that the shoes can be made lighter, the connection between the spikes and the carbon fibre outsole stiffer, and the spikes can be made thinner.
Despite the Dragonflys having everything I look for in a spike, personally, I really like the way the MD-Xs feel underfoot, offering great responsiveness and propulsion, returning as much of my energy as possible to each of my strides.