SIC time
The answer is neither. You really want multi PIC time instead of SIC time.
Having said that, it might depend on your desired next step. Jungle Jet SIC time in the context of your overall experience might give you an advantage for regional(s) that operates them. A couple of freight companies fly Electras in the U.S., so time in them very well could give you an advantage with these companies.
Still, having PIC multi, especially in on-demand or scheduled ops, is better.
Hope that helps.