If you had two rods the same length and supposed to have the same specs, how would you check to see which is the more limber?

1: Check to see if Omnia has done their 'wall' test. They actually put rods up and bend them against a wall with graph-lines to see the rod's limberness

 

2: Test them yourself - either at home if you own both, or in a store that carries both.

I do the same thing without anything on the wall. 
 

Hold the rod in one hand, pull the end of the main line down with the other. 
Compare the ease of pulling to where on the rod it stops bending. 
 

Fool proof 

 

 

 

 

 

Mike

32 minutes ago, Mike L said:

I do the same thing without anything on the wall. 
 

Hold the rod in one hand, pull the end of the main line down with the other. 
Compare the ease of pulling to where on the rod it stops bending. 
 

Fool proof 

 

 

 

 

 

Mike

That might be fool proof to you but I am not sure how to tell the difference when they are both built on the same blank from different builders.  

Well figuratively, you can’t . With mail order being the #1 way most of us order rods via internet it's just not possible. Before BPS moved in to my area there were several awesome mom & pop bait shops with high end rods and reels along with hard baits, soft baits, fly rod , reels etc, etc. 

 

Unfortunately, they were forced to shut their doors forever. It’s a d**n shame too. Rods these days are cookie cutter actions from manufacturers. 95% of mine are American made and 100% of those come from Woodland, WA. 
 

Your question is valid but I simply don’t have an answer. Except doing an in store comparison. 

You are really asking how to tell its power.  The best way is to measure its CCS numbers to find its power and action in objective terms.  Once you are set up to do this it will take a lot of the mystery out of fishing rods.  It may be done without disturbing the "packaging" of the new rod, so if you don't like what you measure you can take it back.  All the talk you hear on this site about fast tip, soft tip, backbone, etc, is just subjective description which depends more on the expectations and inexact opinions of the observers more than they do on the actual characteristics of the rod.  CCS is the generally accepted objective measurement system that the rod building community (mostly) uses.  Some manufacturers are getting into supplying CCS data and there is a pretty good blank data base on line.  Blanks, not rods.

48 minutes ago, Jig Man said:

That might be fool proof to you but I am not sure how to tell the difference when they are both built on the same blank from different builders.  

Do you have both rods right now? If so what MikeL said is exactly what I would do.  
Maybe we aren’t understanding what you are asking. 

Tip end or length of the blank? 
No 2 rod companies are the same regarding bending tip down with measuring against a known standard like CCS data and even that feels different to each angler.

For me it’s touch and feel ideally with a reel and line installed. 
Glass and Glass composite crank bait rods will be more parabolic if limber is your goal.

Tom

Tom these are identical blanks but the custom builders are different as well as the guides are different.

Guide train shouldn’t affect rod bend flex a great deal. More guides distribute lifting power more evenly and overall finished rod weight but doesn’t make the blank more rigid.

Tom