What is the difference between K-3 visa and I-130 petition?

A K-3 is supposed to get your spouse in faster than filing the I-130. It always does not play out like that. If this question is in regard to your spouse, you should consult with an immigration attorney to ensure that the procurement of your loved one's immigration status is successful.

In theory, a K-3 should result in your spouse spending less time abroad.

While either petition will work, the K-3 seems to be a bit faster.

The k3 was created when i130s were taking several years. When done properly now the i130 takes 8-10 months, so there is no need for the k3. Regardless, the process will likely go quickest if you work with a lawyer who has handles the complicated multistep process before.

One allows you to seek admission to the US temporary the other seeks classification to permanently stay in the US.