Well they probably suck.
Now if you line up 4 similar bourbons that use a similar mash bill(let's say 4 versions of Maker's) it could get tough.
But if you don't think you can line up a Blanton's, Weller, Stagg Jr, and Sazerac (all from Buffalo Trace) and a dozen or more of us in this board can't bat .1000 on picking out which is which, you would lose a lot of money. I know
@Raiderdawg, myself,
@NTDawg and a few others will take that bet.
That said if you're point is expensive doesn't mean better, I concur. I have done a personal blind tasting between Eagle Rare 10 year, Buffalo Trace, Benchmark, and Benchmark bonded. They are all the same juice going in the barrel and are just aged different times, in different rickhouses, and are cut with more or less water.
Results
Benchmark Bonded #1 - $17.95
Eagle Rare 10 year #2 - $35.95
Buffalo Trace #3 - $25.95
Haitian refugee porta potty water #4
Benchmark a distant #5 - $14.95
Turns out I prefer the higher proof of the bonded even at only 4 years of age vs a lower proof 6-8 year old BT or even 10 year old ER. The regular benchmark is 80 proof and approximately 18 months old. It tastes like fermented Cheerios. I prolly drink 5-1 Benchmark Bonded over everything else these days.
All that said, best sip I have ever had was a neat glass of King of Kentucky that will sell for $2k plus by the bottle usually.