The outputs don’t make the difference obvious, but the warning raised by tracing the model would give you some information, what could fail using this approach:
TracerWarning: Converting a tensor to a Python boolean might cause the trace to be incorrect. We can't record the data flow of Python values, so this value will be treated as a constant in the future. This means that the trace might not generalize to other inputs!
  if x.sum() > 0:

This warning should be raised while tracing the MyDecisionGate.