@Johnno_ it is much better, although this part I found by looking up the part number.
And on that note, it's arrived, and I ran down to the garage at lunch time and slapped it in!
Here's what the old wheel looked like:

Here they are side-by-side:

At first I thought the new wheel was the wrong colour, but the part numbers match, and when I compared the colour on the internal part of the wheel, it hit me... they are the same colour 🤮
All done:

The new wheel looks much nicer and is definitely firmer, all in all 1000/10, would buy again.