Glad I held out for this one instead of leaping for Rodimus Prime. So without further ado I'm going to make a comparison between R. Prime, Unicronus and the two leader class OPs from the Cybertron series.

1. Unicronus is better than R. Prime (POTP) for the fact that this is not an everyday variation. The black colour scheme is better and the usage of tribal decals is better than the hot rod flame decals.

2. When compared to the two Cybertron OPs, the standard leader class uses the usual red, blue and grey colour scheme which is less impressive than the black, red and grey of the Galaxy Force OP.

3. Both Unicronus and R. Prime have a standard robot mode and a battle robot mode. They both have a standard alt. mode (car) and a battle alt. mode (Winnebago).

4. Both the Cybertron OPs have standard and battle robot modes. Both have a standard alt. mode (truck with flatbed trailer) and battle alt. mode (truck with fully equipped trailer).

Overall what sets the OPs apart from R. Prime and Unicronus is that variation can be achieved in their battle modes such as the fold out wings and guns and furthermore in battle robot mode you can arrange the two main guns over the shoulders or under the arms and let's not forget they're combiners. The OP's have greater poseability and stability so one can see why they are ranked amongst the best OPs if not greatest Transformers ever. I'm sure when Siege leader OP is released this will become apparent.