Which is better I have been playing with an x-convict and and I know none of these have the same shape and i am used to a wide haevy yoyo
There is no better but the DM would fit your preferences.
Between the two… I would prefer a DM, because I’ve used it for all my tricks. Its a great yoyo, but then again its up to your preferences.
The DM has metal rims, which will add more weight, thus causing the yoyo to spin longer and stay stable, also helping you with learning new tricks.
Good Luck choosing your yoyo. 
since you like wide and heavy yoyos i think the dm will be good for you and hitman also has metal rims