Spark shares a great deal with the Fate system, but there are some significant differences.
Beliefs are both similar and remarkably different from Aspects. In Fate, Aspects either give you Fate (If you are hindered by them) or let you spend Fate to improve your roll (If they would be beneficial.) Effectively, Fate is affecting the character in a pretty even handed manner.
In Spark, the Influence economy works a little differently. Any time your character is makes decisions that either support or refute their Belief, they earn Influence out of the experience. This influence will allow them to avoid consequences (harm) that they might otherwise suffer for winning. More influence helps you change other people's Beliefs, and to improve.
There are a host of other differences, including the competitive scene framing, but I will leave those for another day.