The variable approach is better able to allocate MD time in the portion of the simulation where competition between candidates is high, better representing reactive timescales and doing so with reduced computational cost-percycle. It also accounts accurately for the diffusive dispersal of species between reactive steps. Naturally, as reactive events become rare, all simulations will cross over into a regime where competition is significantly reduced, candidates are harder to find and progress is driven with increasing reliance on the update loop.