D 800E Wedding Photographers please comment

John Mots is fully correct in his statements. The final enlargement is the determining factor. As long as the wedding photographer produces same size prints from D700 and D800e it won't make a difference. Viewing at 100% or printing larger than the D700 highest acceptable size might show a difference but hey, than you are a) not comparing same enlargement sizes...b) comparing different resolving power anyway

Otherwise would you suggest the OP wedding photographer suddenly would deliver bigger prints because he has a D800(e) ? Benefit would still be with the d800e and not with the D700 for again the same size of print

With respect strongly suggest you give it another thought and reconsider who is the cracker jack...:)