I must admit I thought that it was the same item , perhaps this is not totally the case going by the reports of those who have seen both? but I would put money on the main component parts (motor etc) being from the same supplier in china question is is a bit more quality on the arms and ground spike as opposed to functionality worth the extra £30? mine (the cheaper version) certainly seems to do its bit and so far has been reliable, time will tell.
I thought the A1 versions' motor was direct from General Electrics special projects division, built when they're not doing black operations work for the US military
FWIW, AA decoys have a stand at Melton Mowbray cattle market every Tuesday and he did say their flappers were made in England too, most likely with China sourced parts as everything else is.