Stacking 210 cabs vs 410

[BassAdder60]

I am aware of the situation of a single 410 cab and having the four speakers layout but what is the improvement if any of stacking two 210 cabs ( horizontally) where the two sets of speakers are further apart than in a single 410 box if that makes sense ? 
see image as example and in my case both tweeters would be off 

 

im aware that vertically stacking is better 

Edited 1 hour ago by BassAdder60