Why not learn both? Pick a small(ish) project and go at it in both frameworks. You've said that you have friends who know both, and you've already got a handle

Why not learn both? Pick a small(ish) project and go at it in both frameworks. You've said that you have friends who know both, and you've already got a handle on web dev through PHP, so maybe Rails one weekend, and Django the next. Now you know which one you like the best, rather than relying on other peoples' opinions.