Posted: 26/07/2013 at 19:40
It depends whether the original was grafted. If so, the new shoot from the roots will be different. If it wasn't a grafted one, the new shoot will grow into an identical form. Either way, it will likely take a few years before it will flower again though - just keep up with the recommended way of pruning.
I know this may not help but I had a similar experience with one of my Wisteria but the new shoot eventually died too, about 2 seasons later. When I dug it out I found the roots had been attacked by Honey Fungus.