In general, both projects set out to provide a solid starting point for developers working on web projects. They both get rid of a lot of the tedious, some-what error-prone boilerplate that many developers find themselves re-creating for each project. The details in how they go about it are slightly different, but for the most part, they achieve the same results.
HTML5Boilerplate has, as you noted, added in some build-script pieces to help developers follow best practices to speed up their pages in terms of server-side items, such as far-future expires headers, etc. where-as the HTML5Reset project is more focused on the semantics, content, and styling. For example, HTML5Reset has more example structure for the content of the page in HTML5 (to help show people how to use some of the new elements), whereas HTML5Boilerplate does not.
The response-time and page speed parts that HTML5Boilerplate includes get more and more important as more users find themselves on mobile platforms, and as Google increases the effect page response times have on page rank. There are lots of papers that show a small increase in the page response time has a measurable negative impact on how your site is used and perceived (especially in an eCommerce setting...often a 100ms slower page will get percentage less things sold).
On the CSS front, the majority of the reset style section for both projects is very much the same, with some minor differences in what the baseline is set to. The IE specific fixes, however, are largely the same, with HTML5Boilerplate asserting a bit more control than HTML5Reset over how IE styles some things like form elements (ie. check box / radio buttons and valid / invalid states)
Two major CSS areas that HTML5Boilerplate covers that HTML5Reset does not are common helper classes to assist with making sites more accessible, such as .hidden
and .visuallyhidden
, as well as some substantial adjustments to the print styles that serve to both make printing more similar across browsers, as well as some cost-savings and accessibility things like making background images transparent (to not waste toner), and adding the actual URL to links and the title to abbreviations.
I would highly suggest reading through both projects' info and how they do things in a side-by-side comparison because the similarities, and also the differences (and the reasoning behind them) is quite informative and has helped me to better decide what parts of each I wanted to use.
Ultimately, just like any "library" sort of project, you as the developer need to understand what you are doing and probably should tweak your baseline to meet the particular needs of the project.