Don't the variables add a good bit of weight vs the fixed? Do you really notice? I've shot gus with scopes a time or two, but never spent any real range time with them. BTW,none of the scoped guns had variables.
This is old data, but is still relevent in most cases:
Handgun Scope Specs In most cases, loading you cylinder with six (or five, depending) rounds of heavy for caliber rounds adds more weight to your package than the difference between a variable and fixed. Either way, it's minute....don't let 2 oz's or less be the dedermining factor; not wearing underwear the day you hunt can offset that weight difference