I bought a K-Tel LP entitled "The Jan & Dean Story" in the early 1980s. Side 1 was the 1977 re-recordings, and Side 2 was a selection of Dore recordings. The liner notes clearly stated that they were rerecordings. Over the years, I think I listened to Side 1 less than half a dozen times. I always thought the 1977 recordings sounded "chirpy". Of course, what they were missing was Jan's voice. On the other hand, Side 2 was great, and I got to hear "Gee" and "There's A Girl" for the first time.
I agree with the overall consensus that the 1977 recordings should have been marketed as Dean only. I cannot stand to hear these versions misrepresented as originals.