Speaker size and soundstage


Question: for floor standing speakers, how does speaker size affect sound stage, bass response, and the depth of music?

I’m searching for a new speaker, and just tested Dynaudio Contour 30 against Tekton Electrons (16x18 room with cathedral ceiling). Tekton’s are bigger (48 vs 45 high, and 10 vs 8.5 wide, about the same depth) and had a much larger sound stage and greater dynamics and depth. Tekton’s as a rule are much bigger than most other brands, which can be imposing in a room, but the size must equate to a greater sound stage. 
But can a smaller tower be designed to achieve the same sound stage and bass depth of a bigger speaker? If so, what what speakers pull this off?
w123ale
Think about it are manufacturers' top models smaller than their entry levels? If small was the best way wouldn't loudspeakers get smaller as their cost and performance increased? Wouldn't the end goal of loudspeaker design be to get as small as possible? 
I don't know if there is an agreed "package" that delivers the goods you speak of.

Too many variables.

I say this because of a past experience. I heard the Soundsmith Strain Gauge cartridge thru Peters  small, average looking bookshelves which  made  HUGE music coming out of them. They didn't sound like wimpy little bookshelves. 

Never experienced that ever again.

This was achieved with one of my "stampers" played on a VPI HRX. Really a "pedestrian" setup by audiophool standards.

Recording will play a major part of getting that immersive experience.
I noticed a significant change when moving my towers away from the wall.  However, the biggest charge came after adding a pair of Rel S2 Sho subs.  The key is to dial the subs in with the correct crossover and to dial in the volume.  I think the mid’s on my towers sounded better.
Many times a simple two way monitor will offer a superior and huge image


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Size again does not matter. 
Huge speakers always, always lose out vs a  high quality 2 way,. Take a  Seas W22 Graphene with Mundorf;'s SESGO caps + a  massive Gertz copper coil and add a  Voxativ  8 inch model. maybe add a  tweeter horn or a  AMT Neo tweeter and you havea  speaker that weighs less than 50 lbs and  blows away any speaker 10X;s its size.
Size  of speaker  has absoluetly  nothing whatsoever to do with huge massive gigantic sound stage, Sensitivity makes sound stage. 
Wouldn't the end goal of loudspeaker design be to get as small as possible?
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This is the new science, The New 21wst C speaker is a lotttt smaller , much less weight vs the old models and is far superior in soundstage/fidelity. 
My Seas W18E001  are housed in a  Thor cabinet,  weighing like 60 lbs, I could easily build a  cabinet from snaded plya from HD and build a  cabinet that weighs ,,ohh say, 25 lbs, sound is equal. 
The new speakers in the future will be much smaller in size, weight and price.