I haven't smoked theses sizes. I like the churchill (it was one of the top 25 cigars of 2005 in Cigar Aficionado). The corona was rated in the June issue of CA:

Peterson Gran Reserva Corona

Country: Honduras
Filler: Nicaragua, Honduras
Score: 87
Source: Cigar Aficionado
Binder: Nicaragua
Wrapper: Cameroon Issue: Jun, 2006
Price: $5.60

Toothy, elegant and good looking. The smoke is woody, with a touch of earth and nuts on the palate. Medium bodied.

Size: Corona
Ring Gauge: 44
Length: 5 1/2"