In reality the two antennas are remarkably similar in specs with the Welsh one having the edge over the one you offered up. The “biggest” difference is that the Welsh one is 6" shorter in length when disassembled and ready to be packed.
Portable is a subjective term and to me conjures up thoughts of lugging gear as an activator. The missing piece in this is the support and the Welsh one and I suspect the one you shared need a very sturdy mast such as the SpiderBeam that I use which is far from light.
My description of this gear combo is transportable and not portable but maybe that is just a nit.
Thanks for sharing the details of this alternative as its good to get a complete picture of what is available.