Hello Jane,
I think you are probably right, I can find no connection between the two families, although my family did come from the Enfield, Edmonton & Poplar areas before moving to the Hackney/Plaistow area.
The only other possible connection is that, on the IGI, many different spellings were used within the same family's records, at least up until the late 18th century. I have also found this to be the case when researching parish records that have not been entered on the IGI.
It may be that way back in the dim and distant past there was only one spelling and that this became corrupted simply because of illiteracy.
Do let me know if you ever find a connection. (I will do the same for you).
Regards,
Bob