Just for some comparisons, here are all of my Model 7's. The first picture is of the whole group with the 4" blades on the top 2 and the 5" blades on the bottom 2. Also note that the top 7 is a 4" with a #6 grind while the other 3 are all standard Model 7 blades. The top and bottom are both SS and the middle 2 are carbon. To tell you the truth, I see very little difference in their performance, but obviously the SS will stand up better in salt water. If all you fish is in fresh water, it makes no difference and the carbon blade is a fine choice. All of these knives have wrist thong and compass with the micarta handled version the only non-stag.

Pap