Different hardware K3 Notes ??

I need to buy 2 more notes.. Mine was a K50-T5 china model. Overall I am happy with that now its on marshmallow and would replace with same

Looking on aliexpress theres K50-T5 and K50-T3 which is slightly cheaper but seems to have the same specs ??

Is the T3s inferior ?? Runs the same ROMs ??

Any ideas ??

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