The CR forearm on the 38-55 (or any other) makes the barrel look longer, and especially on the short barrels is better proportionately than the long one is IMHO. BTW, the CR one is the same length as the std Handi forearm.
A while back someone had the BC or TM forearm on a shortened barrel and it was getting close to the Mannlicher look, pretty cool.
Put the CR one on a BC and the barrel looks like it it grew 6".
Early checkering patterns wrapped completely under the forearm (very nice), later are just a panel on each side (but still nice).
I just put TDC wood on my TM and it completely changed the 'character'.
So, the ability to swap stocks on these and make yourself a 'custom' is one of the things I really like. Get a stock of each and give it a go!