Thanks for the suggestion. We definitely could be asking for more information for each vehicle and this is a perennial request. Try a search of the forum for
more detail to see some of our past conversations on this topic.
We're trying to balance keeping things simple and having enough information to compare. Right now we're erring on the site of keeping things simple for new users and people who might not be too familiar with their own car. Even if we had an option to put in 4x4 vs. 2x4 we'd have people who wouldn't know or wouldn't enter it and we'd be where we are now.
We completely understand the desire for more detail and it's something we're thinking about, but for now we're happy with the way things are even though it means less data to compare.