Simply put, tape on an HVX200A is is not HD. It's a very good SD camera though, arguably better in most ways than a DVX aside from the lowest light conditions at 60i. Speaking of which, there are some "jaggy" picture issues with the 200/200A mitigating against using 60i. At 24p it should be better overall than a DVX aside from the aforementioned low light issue, which is less severe at that frame rate.
Disclaimer: this is as I understand it - I'm not a DVX owner. I'm sure others will correct me if the above is substantially wrong (aside from, the SD-only tape point, which is certainly true).