A Grado is a Grado,and nothing else,except an Alessandro,which is made by Grado.If you like the forward aggressive nature of Grados you should move further up the Grado line.From my understanding the price-for-performance champs are the SE225e and SE80e.
The only other headphone that reminds me of a Grado is the long discontinued AKG K240 sextett,which is a brilliant headphone,but requires a beast of an amp.I did a
review of them,the only on YouTube AFAIK.Have a look and see what you think.
The AKG K701/2 are more balanced across the board vs Grados but do not do rock/metal as well as Grados do IMO.
The sextetts are superior to both in my opinion,but again the amp required is no joke.