Flanged vs Non-flanged Idler Pulley on 2002

[350xfire]

Wondering if the two types of idler pulleys are interchangeable? Rock Auto sells both and my logic suggests that a flanged unit would be better, but, is it?
Thanks

 

[Philip Phibbs]

My 2005 had the smooth idler pulley and I replace with the flanged pulley have had no issues as of yet.

 

[350xfire]

My 2005 had the smooth idler pulley and I replace with the flanged pulley have had no issues as of yet.

Great thanks...