a kennel and a crate are the same thing, just different terms, sometimes I call them kennels, some times I call them crates. what you posted are a plastic kennel/crate and a wire kennel/crate. both can be used for traveling, but a plastic crate is best for travel because they are more enclosed, and sturdier. a wire crate is not hard to break out of, and most dogs can easily pick the lock on a wire crate. I would say the a plastic crate is better and safer. they are enclosed, and much more denlike. I have both and all my dogs love the plastic crates so much more then the wire one. and the wire one is really heavy and akword,and just plain a pain in the butt, I suggest the plastic ones, and no way I would ever suggest a wire crate