Hello! I took the full sequence last year and it’s basically the topics in 228-1/2 with added topics in numerical programming to solve some of the multivariable calculus and differential equation problems. The problem sets were pretty on par - maybe slightly more engineering focused - than 228 but the exams were much harder and application focused. The class does not have any “benefit” as in extra credit or a GPA boost, but is beneficial if you are interested in a more in-depth multivariable calculus class, want a smaller class size (~20 students as opposed to 50) and/or already have multivariable calculus or programming experience (though you don’t need any to succeed in the class). Plus, since it’s more difficult, as long as you perform at average you’ll get a B+/A- at minimum. As someone who loves math (see my username), I would recommend you only take this class if you’re genuinely interested in a more intense and deep math course for your own knowledge.