I have both the Alto and the go and I love them both. They are totally different.
The Altos is a cutting mat with slides that hold your fabric tight for you and a ruler that runs across the fabric plus the mat has inch markings on it.
I is the greatest thing since sliced bread. You can also just use it for a cutting mat I have had mine for years. I also have the carrying case and it is heavy fabric with a zipper all around. My problems is that the puppys chewed on the zipper and wreaked it.
The go uses cutting dies and is great for those hard shapes that are used for appy. But it does seem to use alot of fabric for your shapes. I have the critter with the dragonfly and ladybug and I for got the other shape so it is great for shapes like that .
I have had the Altos for about 12 years and it is still going strong. The company and carol is great they are great about replacing a broken part that I broke.
kjym Kathy