We looked at the Surveyor over two years ago when we moved up to a TT from our old Hybrid. They seemed well-built. We instead opted for the Keystone Bullet due to it having a deeper slide and a better floor plan and more features at the time for what we wanted.
Our old Rockwood Roo was (and the Roo still is) very block-shaped without much of a sloped front end. We found the more aerodynamic sloped front end of the Bullet (and the Surveyor to a degree although it lacks or back then lacked the lower radius curve back towards the frame) to make a remarkable improvement in our towing experience when coupled with the wide stance axles and low center of gravity. Keep in mind this was our experience even though the weight of what we were now towing increased by approximately 600-700 pounds.
Not sure about the Surveyor, but the Bullets now sit higher off the ground due to the floor plans all having a flush-floor deep slide. I've often wondered if raising them up changed the towing experience a bit by also raising the center of gravity. I personally like our non-flush slide and our lower center of gravity but maybe after experiencing the deeper flush floor slide and the room it provides I might feel differently. We also like having a curbside dinette which doesn't appear to be offered anymore with the flush-floor slide floor plans.