Should there be an overall ranking for the stage events?

Because at least on the 1.0.9 the the "Group B" cars are not very well matched in power. E.g. both Lionne S and Gemini 2000 are a lot slower than the Mio Symphonic. At he same time Libra Grande and Avalanche A1 are at least in my experience much quicker and can compete with Mio Symphonic.

I think at least for the stage rankings there should be an overall ranking. This would in my oppinioin encourage the runners to try and experiment with every car.