I like this thread.
Zeiss or Leupold..Like comparing Mercades to a Rolls..
First off let me complement you on your choices..
Both are exceptional scopesas they retail at almost the same price..
I'm a Leupold fan myself but am leaning very heavily toward a Zeiss Conq
on my next scope purchase..

Leupolds Scopes.
3.5 inch eye relief..
They are very bright even in low light.
The wind and elv adjustments are firm but sure when turned by hand..
Its a very light scope..The only complaint is the fact that the Leupold does not come with scope caps or rubber eye guard ring..

Zeiss Scopes
4 inch eye relief.
superb low light performance
windage and elv adj very good.Loud sure clicks
Heavier Scope but it comes with scope covers..

The extra eye relief and scope cover caps are the deciding feature
for me to purchase Zeiss.