Advan DB is a bit overrated if you ask me. I did not replace my tyres when the car was brand new as I tried a friend's Oriel with Advan DB and although the latter was better, but didn't feel significant difference. However I've tried UC 6 recently and the difference is huge. From what I've heard, Dunlop Veuro is also a really good tyre in Oriel. So I think whether you feel significant difference or not also depends on the replacement option you take.