the smaller your small chainring
the closer your chain will be to the chainstay and the more likely it will get slapped by the chain. clutch could be helpful. also if you run a big cassette your chain will have more slack in small-small combinations. i run 48/32 up front and 11-36 in the rear with the non-clutch rear derailleur and i don't get much if any slap. but given another opportunity i would definitely opt for clutch for insurance.