Last time I compared the two products (2 months ago), Midland had lower expenses on a fully overfunded early cash value IUL. Obviously expenses (and comparisons of them) will vary depending on the chosen Testing Option, Death Benefit Option, & Riders.
Either way, Midland most often produces a slightly higher CV and DB vs. its sister product with North American.
Midland has a small asset fee to support their higher caps compared to NA.