Are they water proof to a deeper depth? Able to stand more recoil cycles ? They are both NF 30mm scopes. The SHVs are newer and from what I understand have as good or better glass.
Neither are mil spec glued together scopes.
From where I stand the SHV is the way to go if the tracking and durability is there. And you are on a budget.
I have NXS, NX8, and ATACRs but I like FFP and it gets expensive to put the high end stuff on guns you don't shoot much. I do have a 4-14f1 coming.