bushido's models are clean and devoid of triangulation or shading issues. they also bode well with blockland's looks and style. they're also detailed artistically and enough to get a statement across.
walter's models are triangulated, show a bit of laziness, and some are also inaccurately modeled compared to their real life counterparts when the aim of the pack is to be realistic aside from mimicking BF3, like the AN-94 not having its barrel move or having its importantly distinctive muzzle brake. you could argue that walter's models are more detailed, but most of them are just sloppy overall.
i probably can't change your opinion on which is better in terms of looks, but i'm sure most people would agree with me