I'm writing a blog post about some colored/minority suffragettes and I'm noticing that they seem to write and talk about suffrage differently than the white suffragettes of the time.
Someone from Twoxchromosomes suggested is ask over here. I'm just looking for thoughts on this topic and resources.
I assume you're talking about American women. What you're seeing is, in effect, intersectionality. That is, women of color experience(d) bias and prejudice related to their race AND gender. Getting the right to vote wasn't going to address their grievances in the same way enfranchisement would address white suffragists' concerns. To be sure, some of the white suffragists were vocal advocates of the rights of people of color, especially Black women, while some were explicitly racist and were deeply offended by the passage of the 15th amendment. While some white suffragists didn't see lynching and under-resourced schools as relevant issues, some, especially Quaker suffragists such as Alice Paul, saw the issues as connected. However, Paul also asked Black women to skip a parade she organized or march at the back (more than a few women ignored her.) Frances Willard is an interesting case as she claimed to be an advocate for Black American's civil rights but also said, ""It is not fair that a plantation Negro who can neither read or write should be entrusted with the ballot."
In other words, what you're likely to find is that the differences between the groups is complicated and highly dependent on the women you are looking at. Ida B. Wells, a Black woman, went to England as part of her anti-lynching campaign where she connected with British suffragists. Meanwhile, Nannie Helen Burroughs remained in the states and in addition to starting a school, founded clubs for Black women, similar to white women's groups. For women of color, a lot came down to how they were perceived by those they wanted to persuade. Lighter skin women of color were more likely to accepted into white suffrage circles than darker skinned women.^1
You may find the story of Anna Howard Shaw useful. As a gay immigrant woman, she represented a different perspective on the right to vote than American-born straight women like Susan B. Anthony and Elizabeth Cady Stanton.
Finally, if you can get a copy of Women's Suffrage Memorabilia: An Illustrated Historical Study (2014) by Florey, you can see how white suffragists explicitly used racist tropes in their campaigns. A powerful example was the title of a popular song, "American Citizens Who Cannot Vote— The Indian, the Chinaman, the Idiot and the Woman" - the song makes it perfectly clear who the white women leaders saw as a "woman" and deserving of advocacy.
And one quick note: language is a tricky thing, especially when it comes to writing about history. You may find texts in which Black women refer to themselves as "colored" or as "a Negro." Given you're writing your blog post in 2018, modern language will be more accessible to your reader. For example, using "Black" for women who identified as "colored", "women of color" when speaking of non-white women as a group, and "enslaved" to describe women or their parents who had been slaves.