Yeah, I complained about this a few weeks ago, the two figures on the left are Verlinden resin and the two on the right are Finemolds plastic ones. Yeap, thanks Verlinden for a couple of six foot four/two metre tall Second World War Japanese...
The Verlinden figures are really nicely detailed though and one of the cheaper resin brands out there. You can use them in a regular dio setting just don't put them close to 1/35th figures. Having one standing by himself or using them together most people won't notice the difference.