This one is much more useful, I think.

In my experience, it often takes TWO Dynaplugs to plug a hole that can be handled with one bacon strip. This is because a bacon strip, by it's design, is doubled over when inserted, and so fills more space than a single Dynaplug. This is why I prefer the Racer Pro model, as it has four plugs (three normal, one XL ) ready-to-go.

As for also carrying a razor blade to trim down a plug: well, sure, maybe. But plugs are sticky by nature, and so will compress down against tire tread after a few revolutions. If the plug is on the side of the tire, it's easy enough to simply press it against the tire and it'll usually stick/