Grippavac Poles V3 or V4, What’s the difference?

I’m going to buy a new Gutter Vac. Was going to go for the Grippavac 40ltr as opposed to the 80ltr for ease of movement. But I don’t know what poles to get. The V3 Gutter Lite or the V4 100% Carbon. Any reason why the V4 are more expensive than the V3, apart from the fact they are Carbon. Are there any other benefits? 

Personally went through this process for quite a few months and ended up with a Sky Vac Industrial. Far better Vac in mine and @THL4KELopinion. 

I think Skyvac Industrial is the best but at over 3 grand with all the equipment, one would need to be busy to get your money back.

scottish cleaning service said:

I think Skyvac Industrial is the best but at over 3 grand with all the equipment, one would need to be busy to get your money back.

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Same principle as buying the best WFP, you wouldn't buy an Xtreme unless you had the work to justify it.