TangyyShape is somewhat similar, the zowie mice are very durable though and no drivers is nice. The clicks take a bit to get used to (dont worry about pressing them) but I know for me at least I like the harder ones more now. If you have the money you won't be dissapointed.
Other good options are the fk1/fk1+ if you want ambidextrious or even the logitech g403. The g403 is probably more similar to the deathadder but you really cant go wrong with zowie. A lot of local stores have logitech mice to try and hold so you could check one out.
Ok thanks. :)