Most P&S cameras, above models included comes nowhere close to matching FOV (field of view) that GoPro camera provides (170 and 127 degrees). Canon starts at 28mm and Panasonic at 25mm, which are wide but nowhere wide as GoPro's even medium setting (127 degrees).
With Canon, you can add 0.43X wide-angle adapter, which converts 28mm to about 12mm, which gives you approximate field of view of 122 degrees, similar to medium setting on GoPro camera. You may be able to insert a wide angle adapter on font of Panasonic as well, as it is one of the few P&S cameras with filter thread in the front element. Panasonic's wide angle adapters are rather pricey.
While GoPro is somewhat chunky shaped camera, it is fairly small for obvious purpose of being able to be attached to helmet and so on. GoPro can also take a beating but above cameras, while well-made, will not stand up to the rigors of what GoPro goes through. They are also both noticeably bigger than GoPro.
Most all recent P&S cameras will record sound with video, some in stereo. Some will record in 1080p HD setting; Canon G12 will only do 720 HD while Panasonic can do 1080 HD, which may or may not be important to you.
Aside from wide angle issues, they are classified as different sorts of cameras, Canon being more of advanced P&S while FZ150 is considered a travel zoom. It's comparing apples to oranges. Canon has slightly better overall IQ since it has relatively bigger sensor but less reach with only 5X zoom, while FZ150 has considerably longer 24X zoom lens. In low light setting, Canon does slightly better but Panasonic has newer CMOS sensor that supposedly fares better in low light than CCD type sensor found in G12. In the end, I'm not sure if either one meets your requirement.
