Given the resolution of film vs digital at this time, we could tell! Let any DVD sit for 10 years then compare it to a similarly kept print on ECP and we sure could tell. Chances are, the DVD will have begun to deteriorate visibly.
However, this will change rapidly over the next few years as DVD technology improves as well as digital sensing.
Right now, IDK what you mean by 50 GB files, but analog could produce some pretty big files. - Per Frame!