I haven't ridden the evo. But I thought the Proto was pretty flexy, it had great torsional flex and I feel like it's a great board for beginners all the way up to advanced riders. I'm guessing the evo is even softer. I thought the proto was noodley, so my guess is the evo is a total noodle.
I think it depends on which size and weight. I'm 145 on a 152 evo and it is soft but not a noodle for sure. I was expecting it to be a noodle but it wasn't. No rails for me either so I sized up just a bit. Maybe a box but mostly i want to butter and goof around