The tubing that I have (which is almost gone) that I am 100% happy with for pinch-off fuel lines and clunk tanks measures .106" ID and .160" OD. The wall is therefore around .027". It does not seem to collapse for me in the bend area around the needle valve, but is about as flexible as you could ask for. So this is my gold standard.
I have two different Hobby Shop sizes in my stash. Neither one is good for clunks or shutoffs. They are fine for all the other plumbing, except for diesels, of course. (Which is a whole different problem....) I do not know the brands as I either bought them off the roll or discarded the packaging. Sorry.
.125" ID x .247" OD transparent blue silicone
.093" ID x .215" OD transparent blue silicone
As far as the McMaster Carr choices:
Which one(s) exactly, are you referring to Carl? Have you purchased or used any of these?
I searched thru the whole list. Here are my conclusions, based on the catalog, but not on purchasing any to test:
The standard size is 1/8" ID and 1/4" OD. For our use, I would call this a heavy wall, and no different from the hobby shop size.
In some of the more esoteric sizes--with matching prices--I found this one that might actually be suitable. It has a much thicker wall that the stuff I like, but is still better than the hobby shop sizes. The durometer is not given in every case, so a full comparison is not possible without buying samples. And of course, for our application, having a clear or transparent fuel line can be an enormous help in general operation and troubleshooting.