There are no hard and fast rules about this, but it seems that the ィ here is used in proper nouns to indicate that the English spelling ends with "y" instead of being written "ii", "i" or "ī". Other examples include

• ラッキィ池田: Lucky Ikeda, a comedian
• ファジィ論理: fuzzy logic

It does not indicate that the length of the mora is any different from what you would expect from a [長音符]{chōonpu}.

When a small vowel is added to a kana with the same vowel sound, it does indeed work the same as a [長音符]{chōonpu}. (If the kana has a different vowel sound, then the sound is not extended.)

There are no hard and fast rules about this, but it seems that the ィ here is used in proper nouns to indicate that the English spelling ends with "y" instead of being written "ii", "i" or "ī". Other examples include

• ラッキィ池田: Lucky Ikeda, a comedian
• ファジィ論理: fuzzy logic

There are no hard and fast rules about this, but it seems that the ィ here is used in proper nouns to indicate that the English spelling ends with "y" instead of being written "ii", "i" or "ī". Other examples include

• ラッキィ池田: Lucky Ikeda, a comedian
• ファジィ論理: fuzzy logic

It does not indicate that the length of the mora is different. Functionally it is the same as [長音符]{chōonpu}.

There are no hard and fast rules about this, but it seems that the ィ here is used in proper nouns to indicate that the English spelling ends with "y" instead of being written "ii", "i" or "ī". Other examples include

• ラッキィ池田: Lucky Ikeda, a comedian
• ファジィ論理: fuzzy logic

It does not indicate that the length of the mora is any different from what you would expect from a [長音符]{chōonpu}.