Both of these units appear to be very similar in features. It kind of looks like the Revolution came out first and then Cali Trimmer said oh shit and was forced to come out with something comparable. I'm itching to place an order soon and not sure which way to go right now. I currently have the Classic Cali Trimmer 25 inch - its fine but the maintenance process is so stupid and I'd really like having the single rear drum the new models have. I feel like more love went into the revolution but the cali trimmer did top them a bit in having the exchangeable reel cartridges. Someone tell me what to do please