It's true that the language enunciation is very close for Cantonese speakers, but it's the phrases used that are quite different. Mainland Mandarin vs. Taiwan

It's true that the language enunciation is very close for Cantonese speakers, but it's the phrases used that are quite different. Mainland Mandarin vs. Taiwan Mandarin for example ~ there are a ton of phrases, especially for modern things like "credit card", "take out"..., that people use different words/phrases for. This is also the same for HK Cantonese vs. Cantonese used on the mainland where there was no British influence. It's like UK english vs. US english.