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I've never claimed to be a historian but I believe I recall reading that the old/original carbide 9x19 sizer dies had just a carbide "ring"?
(Straight wall cartridge carbide sizers only have (need) a ring.)

My oldest 9x19 sizer is all steel.

About 15 years (?) ago I bought a stand-alone Lee 9x19 carbide sizer die to compliment my existing older set.

More recently I purchased a new Lee Deluxe 9x19 set which of course has a carbide sizer die also.

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Having never stayed in a Holiday Inn Express, but not believing that modern 9x19 carbide sizing dies make your tapered cases straight, I decided a simple test was in order.

First I removed the center de-priming rod & nut to gain full access to the Deluxe Set's carbide sizer's opening & internal length.

Using my pin gage set I found that the largest pin that can enter the sizer die's mouth is .392", where it's stopped.

A .381" pin can only go ~.210" inside the die before it's stopped by the carbide sizer's insert.

A .371" pin can go ~.409" inside before it's stopped.

A .370" pin will go fully inside & is not stopped by the insert's smallest diameter.

These rough measurements closely mirror SAAMI 9x19 specs.

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This unquestionably shows that modern 9x19 carbide sizer die have a tapered internal "insert" that provides the proper case taper (~.011", mouth-base) to the re-sized case, not a straight, no taper, sizing you'd only get with a carbide "ring" only.

Both of my Lee carbide sizer dies have the same features & while these dies undoubtedly make sizing easier you still can feel the extra resistance to full length sizing a 9x19 case -vs- a 40 S&W case because of the full contact at the last of the sizing stroke.

Really all you need to do is measure your sized case with a caliper & you can see the taper.

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Waiting for the break of day