Soundstage Heresy IV and Forte IV

None of the Klipsch Heritage line have a problem with producing soundstage. Take it from someone that owns La Scala AL5s. 

I dont mean to be unappreciative, but the question was...preface first...I have heard online that Forte Iv's have better soundstange than the H4. Is this true? If this is true, what in the Forte causes this improvement?

The two are very similar in soundstage.  The difference in the two is the Forte has a fuller sound and a bit better bass.

@curiousjim 

Thank you. I am using H4s with a sub so I am covered. Your response has placed me at ease.

I bought a pair of new "open box" (Non sequential serial numbers, but close) Heresy III "Capitol Records Anniversary" speakers maybe 5 years ago or so...1500 bucks for the pair. They use titanium diaphragms in the mid and hi horns which I mention only because the IVs use a different design "poly" mid with seemingly no horn throat for compression...it’s simply stuck on the "tracktrix" horn flare. This wouldn’t matter except when I bought a new pair of IVs the mids just sounded bad compared to my IIIs. Real bad...smile reduction...sold the IVs and kept the IIIs. Maybe it was that particular pair of IVs but life is too short to tolerate unbalanced peaky mids. Ya know? As far as soundstage goes, sitting with my earballs maybe 8 or 9 feet from the speakers, the soundstage is amazing...doesn’t seem to be coming from the floor one bit. I use 2 older REL subs so the low end is covered, and all my other gear is well vetted. I’ve considered trying Forte IIIs as they also have titanium mids but these days it's kind of hard to find a clean pair...the Volti Razz also interests me but their NO RETURNS FOR ANY REASON policy rules them out...am I supposed to go to some audio show and sit in front of a pair for hours? I refuse. I’ll never use anything but horns in my main system as the increased efficiency and tonal immediacy beats "drivers in a box" all day...and all night...