Lately I've been shaving the scalp with my Rockwell 6c and getting way better results than the Gillette SS. If I have more than 2 days growth I shave with the grain then against the grain. I also get great results with the Gem FW. I'd go up against any multiple blade shaver any day for a smoothness test . They have stolen my money for way too long with all their hype . I bought one of those head shavers once and it's still in the package . If you can't get a good shave I'd suggest trying a different razor, blade , or technique. It can be done and done well.
I realize this is an old thread, but I routinely get an effortless BBS with my Blackland Vector and Schick Proline blade. It’s generally consists of just one pass with some buffing. Enjoy your shaves, Jeff