げ・っぽい: the difference
げN2
Meaning
Seemingly, Giving appearance of, [Expresses emotions or feelings]
Past papers
Example
教養がありすぎて可愛気がないのもどうかと思う。
I don't think it's great to be so cultured that you come across as having no charm.
っぽいN3
Meaning
-ish, -like, Characteristic of, Typical of, Tendency to
Past papers
Example
寅さんは惚れっぽく、飽きっぽい。
Tora-san falls in love easily and gets bored just as easily.
How to tell them apart
「げ」: literary; describes an expression or mood; before a noun use 「〜げな＋noun」.
「そう」: the everyday 'looks like': 「おいしそう」, 「雨が降りそう」.
「っぽい」: casual, often negative: 「子供っぽい」 (childish), 「安っぽい」 (cheap-looking).
「らしい」: true to type: 「男らしい」 (manly).