Welcome. And I am sure by now you know the difference between 埋身 and 切身. If you want to say "I now understand the difference between 埋身 and 切身," you have three options:
Written: 我如今明白埋身與切身(之間)的分別 (casual writing)
Written: 我如今明白埋身與切身之別 (serious writing, as in academic discussions)
Spoken: 我而家明白埋身同切身(之間)嘅分別
Here 之間 is often omitted.
Written: 我如今明白埋身與切身(之間)的分別 (casual writing)
Written: 我如今明白埋身與切身之別 (serious writing, as in academic discussions)
Spoken: 我而家明白埋身同切身(之間)嘅分別
Here 之間 is often omitted.