R: Finding similiar/ "duplicate" PAIRS of Text Data

I have 2 columns of address which are not exact duplicates , but I want to pass a code that if the first 5 characters of column 1 address matches the first 5 characters of column 2 address , then its true if not it would be false.

Here is how my data is now

Column 1

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2310 Aldergrove Ave

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3901 Castle Hayne

Column 2

2310Aldergrove

3901Castle

So for both this since the first 4 characters match I want my third columns to say True , True.