The only thing of significance I can see between the two parties is that the voter base for labour will be substantially younger, which is an important difference:

The older boomers have far more assets they want to make sure keep appreciating in value. They are all NIMBYs and benefit most of all from The Decline. The youth are gonna want the opposite - at the cost of the hoards of wealth among the elderly. Hopefully there'll be a larger drive to reduce prices in various ways.

Then again, labour will be having more immigration which will only drive the prices up so there's an inherent contradiction there.

I remain skeptical that any difference will be noticed one way or the other...