Vegeth and Gogeta ssj3

As we all know, Vegeth has never fought at 100% of his capacity...the potara create a true union of body, mind and powers, Vegeth probably could reach the form of SSJ3 (because Goku was able) and as we saw got new techniques terrifying (like the barrier dosen't belong to goku or vegeta but only to vegeth). So my question is....Do you think Vegeth is stronger than a super saiyan 4?? if we consider that Vegeth ssj is probably stronger than Goku ssj3 I think Vegetto ssj2 have the same power of Goku ssj4 and Vegeth Ssj3 is far superior to goku ssj4... please leave your opinion with one comment :)