Bro right now there is a product in the market named Yokohama Blu Earth A which is even superior to Advan DB in features...As its wet grip rating on Yokohama's Official Website you can yourself check is better than Advan by 1 point...Rest in other sectors also such as the Wear Resistance and Fuel Economy e.t.c the Blu Earth has got better rating than DB by 1 point!!!
There is also the product simple Blu Earth which is inferior to DB like you are saying but mark my words Blu Earth A has better grip than Advan DB just the downside in it is that it is offcourse not as much as silent as DB but surely is a very silent tyre as its silence rating is also 9/10 while Advan DB is 10/10 thats why Advan is a 100% noiseless and comfortable tyre...And thats simply the reason why all of the people these days are getting Advan DB because it is a premium product from Yokohama!!!
P.S I have got Blu-Earth A in my Grande and am pretty satisfied by the results!!!