While I can't give an exact answer since all the numbers I found did not come from the Macbook Air but other devices with similarly performing CPUs.
And for the V I'll take the i5 version since that's the only one I've got numbers for right now.
So, in terms of pure CPU performance the i5 should be pretty similiar to the MBA. But that does not tell the whole story, because the i5 in the V is cooled without a fan and uses less power for the same performance the i7 of the MBA delivers.
I can't really compare the m3 and the i7 of the V as I don't have the numbers on hand, but based on some guesswork the m3 should be a tad slower than the i7 of the MBA and the i7 of the V should be a tad faster than the i7 of the MBA - all 2 still having the advantage of being fanless & more power efficient.