The Impossible Burger and Beyond Burger have similar nutrition profiles. Each 4-ounce (113-gram) serving provides around:

Both are rich in protein, providing close to the same amount you would get from a 4-ounce (113-gram) beef patty.
However, their protein source differs. Soy and potato provide most of the protein in the Impossible Burger while peas, mung beans, and brown rice are the main sources of protein in the Beyond Burger.
Whereas the Impossible Burger is slightly lower in calories and fat, the Beyond Burger contains fewer carbs. Both have similar amounts of sodium and provide around 25% of the Daily Value (DV) of iron.
In addition, the Impossible Burger is fortified with additional vitamins and minerals, making it slightly higher in zinc, phosphorus, certain B vitamins, and vitamins C and E.
Summary
Both burgers have a similar nutrition profile but their source of protein and main ingredients vary, making the Impossible Burger slightly richer in certain vitamins and minerals.
Both are Suitable for Special Diets
Both the Impossible Burger and Beyond Burger can suit various dietary needs.
For instance, both burgers are halal- and kosher-certified, in addition to being gluten-, peanut-, and tree-nut-free. The Beyond Burger is also soy- and GMO-free.