My experience, kelme upper (mine was star 360) feels filmsy. Gato feels solid all around. But i prefer the toebox on kelme. Bit wider. Adidas sala quite tight on the size, lighter. Most solid was xmunich for me, but have problem the side pulling out, small issue, heavy tho. Mundial never tried. Tempted to buy one, one day. Currently back to sala after retiring my munich.