Other Mearas?

[symestreem]

This was in ths Sil.

Of those horses many of the sire came from Valinor, and they were given to Fingolfin by Maedhros in atonement for his losses...

Perhaps the Mearas were elven in origin? If not, could we expect the elven horses to be the equals of the Mearas, coming as they both did from Valinor? Perhaps the elvish horses would even be slightly better, because they would have been bred with each other, while the Mearas might have sometimes been bred with other horses.