I think Helle use VG10 to 59 HRC core stainless steel sandwiched between high corrosion resistant and tougher 18/8 stainless steel (Helle has a high polish for excellent corrosion resistance). So it provides a good compromise i.e. toughness with a excellent sharp edge (might chip out though if abused). The Helle Temagami signature knife looks to be an excellent knife. More bushcraft rather than tacticool style so may not appeal to everyone.

The Triple laminated Stainless steel will have the advantage of much superior corrosion resistance over the carbon steel version. The carbon steel version will most likely have little or no advantage over the stainless steel in terms off the ability to take an edge, ease of sharpening and toughness.