I’ve posted a build report for Trumpeter’s 1/48 MiG-3 Late Version kit on AgapeModels.com, and also compared it to Ark Models 1/48 MiG-3. To cut to the point- the Trumpeter kit is the clear winner in fit, detail and ease of build.
On AgapeModels.com: Trumpeter’s 1/48 MiG-3 Late Version