no difference… the chip itself is pretty shit and that’s the issue… the much larger antenna it comes with normally is more easily manipulated in terms of distance from reader etc. which affects timings etc. which the chip really has a hard time with etc. Basically my hunch is that they made a magic chip that was meant to be put into a card format that juuuust barely bit banged things out with the correct timings… and probably juuuust barely had the required gate logic sensitivities required… and was still probably pretty picky about exact placement etc… but changing the coil dimensions chances resistance and distance to the readers required and that affects gate logic and signal timings and well the chip is just shitty.
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