strong suit vs. long suit

[Torsten]

Hi,

I used to think that there is this idiom "not my strong suit". It seems that there is also the phrase "not my long suit". At least that's what I think after reading the following paragraph:

I must confess, I feel somewhat inadequate in the area of finances, taxes etc. It is not my long suit but I am smart enough to know I must understand what is happening financially or I will be out of business quite quickly.

So, what is the difference between both expressions?

TOEIC listening, photographs: The gondolier

[Yankee]

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I'd only ever heard the expression as "strong suit", Torsten. But apparently the meanings are the same.
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