[Icom] Questions on 706MkII vs 746Pro vs 756ProII

[Ray, W2EC]

First question - Bandscope vs Spectrum scope:

On my 706MkII, when I turn on the bandscope sweep, the RX audio is
muted, so sweeping to watch for other signals appearing on the band
while in QSO is not usable. Since I use this rig mobile only, it doesn't
matter to me as I don't use that feature mobile, just tried it out to
see what it did.

I'm thinking of getting a new rig for the cottage and looking at the
746Pro or 756ProII because of the bandscope feature, as I have the
analog version of that capability on my TS-940SAT with SM-220 scope here
at home and like it.

I downloaded the 746Pro ond 756ProII manuals to make some comparisons
and I see that the 746Pro manual indicates that the bandscope sweep,
when in operation, also mutes the RX audio (like on the 706MkII and
presumably the MkIIG), however it does not say anything in the 756ProII
manual about the RX audio being muted and in fact doesn't call it
"bandscope sweep" as on the 706MkII and 746Pro, but calls it "spectrum
scope".

Can someone with a 756ProII tell me if indeed the spectrum scope sweeps
without muting the audio, so you can maintain a QSO while still sweeping
the spectrum, visually checking for other activity? If so, does it work
the same on the earlier 756Pro too?

That seems to be one of the major differences between the 746Pro and
756ProII and would be a key deciding point for me as I really like the
ability to monitor the spectrum while in QSO like on my TS-940S/SM-220
setup.

Second question - Dualwatch:

I take it that Dualwatch is only available on the 756ProII and nothing
similar is on the 746Pro?

At home I use the TS-940S primarily on MARS and maintain a watch on a
second MARS frequency (in the same band/mode) with a KWM-2A. Sounds like
I could use the 756ProII to maintain the watch of both frequencies so
don't need the second rig. Is it a simple matter to toggle back and
forth between the two watch frequencies, so if I hear myself being
called on the "secondary" frequency I can just push a button (or
whatever) to swap the two "channels", i.e. bring the "secondary" freq to
the "primary" and the "primary" freq to the "secondary". Does the
balance remain the same between foreground and background signals
regardless of which frequency I swap back and forth?

Thanks & 73, Ray  W2EC