It's true that the 230 Target Hybrid and the 230 OTM Hybrid both have the same thickness jacket, although they're different lengths.
However, the 210 VLD is made on a thinner jacket, which is also shorter than both of the 230's.
To generalize, the Target and Tactical lines all have thick jackets, while the Varmint and Hunting lines all have thin, or 'standard' jackets.
-Bryan