Probably similar to the new A lounge; the lounges in E are both purportedly quite nice. Not hard to be better than the D lounge or the awful A temporary lounge. And yeah, I forgot of course that LH Group treat *G higher than J for lounge access... it's a weird quirk, although IME ZRH might be one of the few places with a really noticeable difference, as at least for me in FRA and IAD the Business and Senator lounges have felt pretty similar and outstations they're usually different sections of the same lounge.

Flying other carriers with the same segregation I'm never really sure which lounge is supposed to be "better" (e.g. SK, QF) and it's often very hard to tell just by looking at the amenities.