Right is falling apart (literally, it hasn't been lived in for at least a decade). It is a post war Airey construction semi. The only thing going for it now is the size of the plot, but basically needs both sides of the semi demolishing and new builds replacing (which is what mine & LHS were 27 years ago).
Left was built identically to mine, has a slightly smaller plot but is at an angle to mine so gets different sun times. They've knocked through the, slightly offset, kitchen & dining room. I've added a study and a conservatory.
On balance I prefer mine to either side.