The comparison between a wakizashi and a katana in terms of which one is "better" depends on the context and the specific criteria being considered. Both swords have their own unique characteristics and intended uses. Here are some factors to consider:

1. Length and Reach: The katana is longer than the wakizashi, which gives it greater reach and cutting power. This makes the katana more suitable for combat situations that require extended range or engaging opponents from a distance.
2. Maneuverability and Close-Quarters Combat: The shorter length of the wakizashi provides better maneuverability in tight spaces or close-quarters combat situations. It allows for quick and agile movements, making it effective in confined environments or when engaging enemies at close range.
3. Versatility: The katana is generally considered more versatile due to its longer length and design. Its curved blade allows for effective cutting, slashing, and thrusting techniques. The katana was the primary weapon of the samurai and was designed for use in various combat scenarios, from one-on-one duels to battlefield encounters.
4. Symbolism and Social Status: In traditional Japanese culture, the wakizashi was seen as a symbol of a samurai's honor and was associated with personal self-defense and acts of seppuku (ritual suicide). The possession of both a katana and a wakizashi, known as daisho, represented the social status of the samurai.

It's important to note that the "better" sword depends on the specific requirements, the skill of the wielder, and the context in which it is being used. Both the katana and wakizashi have their own advantages and purposes. Historically, the daisho set of katana and wakizashi was considered complementary, with each sword serving its own role on the battlefield and in different combat scenarios.