Which Grinder Pump ??

[maarass]

Were having our utility trench dug soon and my contractor might want to subsitute the eOne grinder with another called Gould (sp?). He says the local supplier has them and it would make more sense to get it close in case of mantainence issues. Makes sense because I know the closest eOne guy is a few hours away. Anyway if the units are compatible in specs and the warrenty is the same, are these unit comparable ?
Thanks