Article spinning & HTML: does HTML need to vary also?

Hi, I'm building "Alternative to competitor" pages for a website, planning to do about 20 pages
I'm going to spin the text, but I came accross a message on this forum mentioning "HTML variations"

Is it necessary to make the HTML vary?
And if so, what aspects of the HTML need to vary? (meta, dom, div class names, div order, ....)

Thank you

No

I am also curious if the HTML need to vary