Spanish vs Greenback question

[WahooUSMA]

Why are greenbacks that much better than Spanish mac’s for YT? I’ve read numerous articles referring to pinning a Spanish mac on and what great bait they are. Then, I’ve read other articles that indicate Spanish mac’s are the least preferred bait for YT.

I can’t remember the last time on BWE I read about someone pinning a Spanish mac on and nailing a YT. What’s the difference? I know I’ll get some wise @ss remarks, but I am totally serious. Last weekend I couldn’t catch a grennback for the life of me, but caught a shit load of Spanish.