Both fences seem to have the post spacing of around 10 scale feet. The gate on BLMA fence fret is about 4 scale feet. BUt as you can see in the photo, there is a bid difference in appearance. When GMM fence first came out, we all thought it looked great as it was the only etched stainless-steel chain-link fence available. But compared to the BLMA version GMM fence has really large size links. The figure I placed on the fence could easily pass their fist through one of the links.
BLMA fence is much closer to scale. But it doesn't seem to be fully etched so the openings look round instead of having diamond-shape. My favorite is TrainCat chain-link fence, but unfortunately is is not available right now.
TrainCat fence has links slightly larger than BLMA but still much smaller than GMM fence. But one side of the link area is fully etched on one side so the links look much lacier than the other fences.
I'm planning on posting a comparison of several photoetched chain-link fences in N scale but I haven't had the time to do it yet.
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