The IRON BAYS are not identical. The Cline uses the needle and Diaphram from a walbro "WA" carb, while the IRON bay uses a schrader valve "valve stem" and a Walbro "WA" diaphram. The Cline while injected molded glass filled nylon is half the weight and size of a IRON BAY. The IRON BAY is very bulky. Performance wise they work equally well. But I would really prefer four Clines myself versus the large, heavy, and bulky Iron Bays.
The Cline while being nylon is very strong. I just rebuilt a 7 year old cline the other day for $3.00. I would not like the weight penalty of 4 Iron Bays.[:-]