If you have never towed anything before the narrower trailer may "feel" like it tows better if you did back to back comparisons simply from your field of view perspective. This assumes most things constant but the width. It will take some adjustment when you look in the review mirror the fist few tows and it looks like someone is tailgating you and you are forced to use the side mirrors. Once you gain some experience and your side mirrors are appropriate and adjusted correctly you probably will not notice much difference. So I would purchase the TT that suites your desired floor plan and remains under your tow vehicle manufacturer towing limits.
