Not sure on the JVC cam, but in regards to the Canon, for the money that your payin, its not bad at all
I've got the MV400 from 2 years ago, but they're very similar.
Picture quality is very good, and handy size. Spose it dont come w/ all bells& whistles like Sony's, but then your not paying for that
Add on tho that the improved CCD of the MV400, more powerful zoom, and better low light shooting capabilitites, then it adds up to a good choice.
Just my opinions, others may dissagree
BYW, you may want to pay a bit extra for thr Memeory card or DV IN functions