What is the most efficient type of electric baseboard heat (permanent install)?
I am looking to replace some 40-year-old electric baseboard heating units, hopefully with something more efficient. There doesn’t seem to be any standardized energy efficiency rating system for these, and i have yet to find a serious objective performance/efficiency comparison of the many available brands.
Also, i am wondering if the initial (considerably greater) expense of hydronic-type heaters pays off in the long run with substantial electric-bill savings.
Personal experiences welcomed.

Electric heat is the most expensive in the long run BY FAR! You’re on the right track with the hydronic- type. Power it with a solar evacuated tube system and watch the money build up in your bank account instead of flying out the window.