racket most similar to Duora 6

You can try looking at the new Arcsaber Pro series from Yonex. There’s Arcsaber 11 & 7 Pro.

If you want more headweight, go for Arcsaber 11 Pro.

If you like more headlight for speed, defense, flat game, and so on… go for Arcsaber 7 Pro.

I would recommend you try your clubmate’s rackets or test swing new rackets you see available in badminton stores where you reside.