The switching would only be usefull if you had more than one HDMI source.
Equalitys-
The both have auto-setup and are 7.1 receivers. Both have pre-outs for future upgrades. The have the same # of component video inputs and digital inputs. Both have the same basic decoding functions.
Yamaha's Advantages-
It has Zone 2 capabilities (presence can be used to power Zone 2), phono input, more analog composite, RCA stereo, and S-video connections. More DSP modes and widely viewed as having superior DSP modes, A-B speaker operations, Yamaha's presence channels for it's DSP modes.
Pioneer's Advantages-
THX Select certified and THX modes, slightly more powerful (not overwhelming or maybe not even noticable), and many think that it looks better than the Yamaha.
I think I have swayed myself to like the Yamaha more based on these findings, and I was so sure the Pioneer was the best pick.
My vote, go for the Yammy.