I think the comment every author fears most is, 'this story is just like ...'
I doubt the similarities are as strong as you think - it's possible someone reading both stories wouldn't give more than a passing thought to their similarities.
I've often thought it would be a fascinating exercise to give a group of writers quite definite guidelines and then see the different stories that are produced.
I would go ahead and post. Perhaps you could include an author's note something like this - 'After writing my story, I realised [...] by [...] has certain similarities in plot. That story did not influence my story.'
Corrina.
