'm curious to know if you can get the same benefits and learning how to be rooted with a balance board or wobble board will help you more?
Stability Devices
As most have note, there not much value in them.
They are primarily used with Physical Therapist with balance issues. They retain the proprioception; the brain is able to send faster messages to increase your balance ability.
However, for normal individual they offer little value.
Tudor Bompa
Tudor Bompa wrote
Periodization Training For Sports, now in it 5th addition. It is systematic planning of training for athletes (everyone) to maximize their results.
On a side note, it has been dumbbed down to "Muscle Confusion" and "Deloading and Reloading" training methods; which only provide you with a small snapshot rather than providing you with the complete picture of what you need to know.
In speaking at the National Strength and Conditioning Association Clinic one year, Bompa was ask using wobble boards, et for training athletes.
Bompa's reply was...
"If you play on a wobble field, train on a wobble board."
That because stability devices do virtually little for any specific sports training. Secondly, they do very little for increasing core strength by individual standing on them and performing exercises.
The Gymnastics Balance Beam
Bompa went on to state that the most effective method of developing balance on a Gymnastic Balance Beam is to train on it.
With that said, that is true for all sports.
Stabilizer Muscles
Exercises that require more stability/balance (such as a one Leg Deadlift) increase strength in the stabilizer muscles but not as much strength in the primary muscle involved in the exercise.
That means an individual preforming one Leg Deadlifts isn't going to be as strong as an individual performing a regular Deadlift with both legs.
Primary Muscles
Maximizing strength and grow is more effectively accomplished by eliminating or minimizing the involvement of the Stabilizer Muscles. The most effective method that does this is training on machine, like a Leg Press.
However, exclusively training on machines has very little carry over to free weight exercises. That due to the Stabilier Muscle not being strong enough to let's say perform a Heavy Squat after only performing Heavy Leg Presses.
Free Weight Training
Free weight training exercise means you end up increasing strength in your Stabilizer Muscles, some balance is required, as well as your primary muscle groups.
Strength is developed in the Primary Muscle. However, not to the extent it would be with machines.
Strength is developed in the Stabilizer Muscles (balance). However, not to the extent it would be with something like a one Leg Deadlift.
Summary
Stability Devices are effective for Rehab Therapy, used by Physical Therapist. However, they have a very limited value for normal individual or athletes.
As Snowman said, You "really don't get any bonus points for having extra. "Enough" would have to be defined by your sport/goals; obviously a surfer will need more than a runner."