I don't think this has been done before, and it does come up occasionally, so I'll add some pictures.
This is a physical comparison of the 239 (this one in 40) and the 225 (9mm).
You can see that the difference in sizes aren't just that great.
This is the 239 laying on the 225.
A comparison in width...and yes...I dropped my gun on the floor and chipped the grip on my beloved 225...am I STUPID or what ?
and finally side by side...
One might notice that the grip on the 225 has a bit more space for the hand,thus the major difference in feel...escpecialy if you have big hands like me...even so, the Hogue grip is a major improvement over the stock grips on the 239.