How less efficient is a short vertical than a 1/4 vertical?

I would like to see some numbers. It is a ground plane with 4 radials
(typical). Free space.

Assume a source at the base. The type of source is your choice. EZNEC
defaults to one amp, but can be changed to a constant power of your choice.

I'm sure I've left out additional requirements, but maybe this will be
a healthy discussion even so. Suggestions are welcome.