Sun salutation and burpees both are amazing full-body exercises. Both are good for the heart and help to torch lots of calories. But both have their limitations. Burpees is a high-intensity exercise, in which you will have to move quickly, if you are obese or have joints or bone issues then it not the right choice for you.
Yoga always helps to gain flexibility and tone your muscles. The same is with the sun salutation. The traditional suryanamaskar is a low-impact exercise, so anyone can master it with practice. However, if you aim to lose weight quickly, you must look at its aerobic variations that can help you in weight loss.