The speed of a Spikeball (Roundnet) serve can vary depending on the player's skill level and technique. Generally, the speed of a Spikeball serve is not measured as extensively as in sports like tennis or volleyball, where radar guns are commonly used.
However, based on anecdotal evidence and observations, Spikeball serves can reach speeds ranging from 30 to 60 miles per hour (48 to 97 kilometers per hour). These speeds are estimates and can be affected by factors such as player technique, arm strength, and playing conditions.
Comparing the difficulty of serves between Spikeball and volleyball is subjective and can vary depending on individual preferences and skill sets. Both sports require different techniques and strategies for serving, and what one person finds difficult may not be the same for someone else.