Difference between axios form data and axios simple method of posting data

Question

I have a need to post a single image and also multiple images. The way I post data is quite easy

var optionAxios = {
    headers: {
        "Content-Type": "application/x-www-form-urlencoded",
    },
};
axios
    .post(
        "https://example.com/users/update_profile",
        {
            currency: this.currency,
            email: this.email,
            country: this.country,
            names: this.names,
            language: this.language,
            userid: this.$store.state.userid,
            telephone: this.telephone,
        },
        optionAxios
    )
    .then((response) => {})
    .catch(function (error) {
        console.log(error);
    });

I want to post a file and I was wondering if formData is the only available method I can attach single and multiple files in Axios.

The formData method

let formData = new FormData();
formData.append("file", this.file);

this.axios
    .post("http://localhost:8000/api.php", formData, {
        headers: {
            "Content-Type": "multipart/form-data",
        },
    })
    .then(function (response) {
        console.log(response.data);
    })
    .catch(function () {
        console.log("FAILURE!!");
    });

Would it be possible to attach a file or multiple files to post data without using formData?