If you are looking for dependability and just an all around better gun, go with the 1187 hands down. The 1187 is one of the best guns on the market that has outperformed many more expensive guns. Although I can't say I have much experience with the Featherlight, I have had experience with some of the other Ithacas. I have over 20 years experience with the Rem. 1187 and it's an incredible gun for the money. Never a failure in any weather shooting clays, birds, deer, etc. I have a Hastings rifled barrel on mine and it really knocks them down at 150 yards plus.
I hope that helps!
"A fool learns from his own mistake but a wiseman learns from a fool's mistake "