I have the genesis- hands down, great trimmer!
I also have the cutterpillar trimmer. For the money, it is very similar to the genesis- it isn't as well made as the genesis and that's why there is a price difference but it is comparable. (the cutterpillar is more plastic). But the cutterpillar is a GREAT option! I love mine!
I have the Stampin' Up trimmer and take that with me when I go to crops because it is more light weight and portable. I have taken my cutterpillar as well.