the victors come with the same type of foams. i am listening to a wonderful pair of loaned ie8 now and am not ready to make bold statements yet, but i do agree that the victor is more forward than the ie8 especially in mids. the senn is more forward in upper bass and i think the victor may reach lower or at least vibrate with greater voraciousness down low than the ie8. however, i have never, ever heard an iem with this width of stage... it is simply frightening.
To see who is king of soundstage in IEM, I like to buy a tri fi 10 pro to compare soundsatge with.