Well, I think that the new series is really more of a spin off of the anime series. Ie the character of Kindaichi acts like the kindaichi in the anime, not like Domotos. Their portrals are completly different. It's not a matter of match up. I like the new series, because in the original series it got kind of grating that every time the bad guy almost always died. The new series usually has the murderer living. In one case, the cop suggesting that they go visit one in jail, since she was thier friend.
They use completly different scripts, which is nice. And I think once you get used to it being a different actor, you might like it!