稀里糊涂and糊里糊涂, Are there any differences?
糊里糊涂: 形容人行事極為迷糊或不明道理 (describes people acting extremely confused or unreasonable)
唏哩花啦: 1. 形容物體滾落、撞擊的聲音 (describe the sound of objects rolling down and hitting)  2. 比喻破敗難堪的情境 (metaphor of dilapidated and embarrassing situation)
稀里糊涂 sounds like the combination of the two (confused and embarrassing)
唏哩花啦 has no meaning on their own in the idiom, they are sound effect characters