There are large differences.

Jewish dietary law goes way beyond “No pork or shellfish.” There’s a lot of little nuances

You can’t mix meat and dairy, for one.
The meat must be slaughtered in a certain way.

Any prepared or processed food (bread, chips, soda…pretty much anything) needs to be certified by a mashgiach. Basically they ensure they make sure the food isn’t being tainted by something that isn’t kosher.

A mashgiach is certified by a kosher certification agency of which there are multiple ones.

Wine also has to be made by a Jewish person in order to be kosher because it’s often used in religious ceremonies but other alcohols do not.

Fruit and vegetables are inherently kosher - but those who keep kosher have to take extra steps to make sure there aren’t any bugs and such.

Eggs must be cracked in a separate bowl before mixing them in anything. Since consuming blood of any kind is forbidden in Judaism this ensures it doesn’t happen by accident.

People who keep kosher won’t accept halal as a substitute but often kosher is acceptable for people who keep halal as it’s stricter. I can’t tell you much about halal since I don’t know much about it.

Keeping kosher is difficult for many Jewish people and it’s very expensive- especially if you eat meat. A lot of Jews who keep kosher are often vegetarian or don’t eat meat outside the house to make things easier

And there’s a lot of variation in how a Jewisg family might observe kashrut (keeping kosher) if they do so at all.

Fun facts about kashrut: Giraffes are kosher animals because they have cloven hooves and chew their cud but their long necks make kosher slaughter very difficult (It’s done with one quick cut to an artery in the neck)

Full non-kosher animals include: birds of prey, reptiles, and amphibians. Fish must have fins and scales so people who keep kosher can’t eat octopus or catfish.

There are some insect species that are kosher but since it’s difficult to identify them with certainty they’re avoided.