In fact, Namco is a great one to compare it to. Mechanically they are clearly different, but in terms of purity of racing, Ridge Racer and DriveClub are not at all dissimilar. Very no frills with a distinct focus on pure skill-based racing.
DriveClub is a bit of a fascinating mix, a simcade with its own unique approach to vehicle mechanics, there's a bit of a wide range of racing titles that straddle the lines in the title, but they really nailed the mechanics to perfection and that feels distinct. As I said, if it were not for FH2, I'd say this was easily the best racing game in the past 3 or 4 years, and probably amongst the best of its class in its subcategory of racing genre period mechanically.
DriveClub's tracks are extremely well designed however. They are perfectly primed for just the sort of hundredth-of-a-millisecond time shaving fanatics that racing fans like me (and apparently you) love. The A.I. is incredibly engaging because they're so aggressive, and you really feel like you have to claw your way to the finish line if you get broiled in a vehicular brawl on the road. Similarly, time trials are phenomenal, just as you'd expect from a pure skill based racer. Here you really get a sense of how finely tuned the mechanics are and how many thousands of ways you can strategize to eliminate the tiniest fractions of time from your overall score.
They are not designed for a hundred short cuts or to give the most dramatic stylized loops and dips, they're made to give you slices of specific challenges meant to test your accumulated skill sets. Each provide a different slice of challenges for each of your skills, and combine them in many extremely engaging ways to provide very interesting and fun races.
The main focus of DriveClub is obviously mechanics, because they were clearly playtested by people who know what's up with racing games. I've played racing games since I was a boy, I invest in wheels and enjoy a wide range of racing subgenres and I've always been a top-of-my-class racing genre gamer competitively. I'm extremely particular when it comes to my racing games, and am very critical when a racing game fails at what it sets out to do, resulting in a very poor game that does not test your skills or warrant your attention.
DriveClub succeeded in every way at what it set out to do.