One of the most common questions is, “What’s the difference between Pilates and yoga and can I do both?” The answer is yes, most certainly. Based on my client’s goals I take the best from both disciplines and tailor a program to each individual.

Pilates	Vs	Yoga
Pilates Philosophy		Yoga Philosophy
Pilates has a deep body-mind philosophy with more emphasis on the body through controlled, precise movements executed perfectly.		Yoga has a deep, philosophical basis. It focuses on uniting body, mind and spirit to bring about harmony and well-being
Pilates The Newcomer		Yoga The Elder Statesman
Pilates isn’t even 100 years old. It was developed in the 1920s by Joseph Pilates in Germany to rehabilitate soldiers returning from WWI.		Yoga is at least 5,000 years old and is steeped in ancient Hindu culture.
Pilates Poses		Yoga Poses
Both Pilates and yoga are designed to use your own body weight to create resistance and improve muscle strength and endurance safely.Pilates is a series of exercises that focus predominantly on the abdomen, thighs, legs and back. Pilates engages deep core muscles that help support the spine and improve posture.		Both yoga and Pilates are designed to use your own body weight to create resistance and improve muscle strength and endurance safely.Yoga poses can improve flexibility and strength, boost vitality, influence the function of the body’s internal organs, improve our capacity to cope with stress and improve mental clarity.
Pilates BodyMind Connection		Yoga BodyMind Connection
Pilates puts great emphasis on the body and mind connection with extreme focus on controlled, precise movements executed perfectly.		Many yoga classes focus purely on the physical aspect, however the primary function of asana (breathing) is to bring about harmony so you can meditate. The union of body, mind and spirit is at the heart of yoga.
Pilates Breathing		Yoga Breathing
In Pilates you are encouraged to breathe in through the nose and out through the mouth whilst gently engaging the deep abdominal muscles. Joseph Pilates believed the key to good health was in deep breathing, particularly focussing on the exhale.		In yoga generally you breathe in and out through the nose. There are many different types of breathing techniques that can bring about profound changes in the body, mind and spirit
Pilates Health Benefits		Yoga Health Benefits
Pilates improves your posture, strength, balance and endurance. It also enhances respiration and circulation. Pilates stabilises the spine and pelvis, helps prevent back pain and improves spinal health.		Pilates come with long-term health gains. Yoga has many physical benefits such as improved flexibility, strength and balance and muscle tone. Yoga also works at a much deeper level, stimulating digestion, circulation, respiration and hormonal balance to name a few. It is mentally and emotionally restorative and can help manage or prevent serious illness such as osteoporosis and diabetes

Ref: http://www.naturaltherapypages.com.au/article/yoga_vs_pilates