Based on my testing of both puzzles, the YS3M feels much more controllable and stable. On the other hand, the RS3M v5 is highly cost-effective and offers slightly higher turning speed. However, it is worth noting that my comparison was between the RS3M v5 Ball-Core MagLev and the standard YS3M MagLev. If you prefer a highly controlled feel, the YS3M fits that description perfectly, especially if you go for its Ball-Core variant.