The only negative I can see in the Colt is the ridiculously narrow rear sight notch.
FWIW the Model 10 was offered with several different front sight and rear notch widths, sometimes concurrently. However, the vast majority of later-production (i.e. late 1960s onward) M10s have the wider sights.
Another plus for the M10 is a wider variety of available barrel configurations; it has been offered with 2" tapered, 2" heavy, 3" heavy, 4" tapered, 4" heavy, 5" tapered, and 6" tapered barrels, albeit not always at the same time.