I recall reading an article that trying new sodas can taste like bubblegum to you if you're not used to them, due to the specific compounds used to give it a taste not being common in things you've tasted before. It's like how people from the UK will think US soft drinks like taste like bubblegum, whereas people from the US think UK soft drinks do. Once you get used to them the "bubblegum" taste kind of goes away (I say this from experience).

Having drunk plenty of soda in the US and UK, including some of the more weird ones you can get (like chocolate flavour), Inca Kola tastes pretty good and I drink it pretty regularly, doesn't taste much like Irn Bru at all (which I also love).

One of the chocolate ones wasn't bad, the others were terrible. Also, the actual "bubblegum flavour" sodas do actually taste like bubblegum, but they're kind of gross.