I've riden sub freezing with the non-insulated ones and still had nice, warm hands.
I like the feel of no insulation - that said I've never tried the insulated ones.
For me I'd rather have the no insulation but waterproof liner as an option, since I couldn't feel the liner anyway. Maybe others could.
OSSA Explorer 2014 AND 1974, Ducati Multistrada 'S' custom-Lotus M100- '68 Benelli dynamo trail- 76 OSSA GPII Phantom (project)