Having trained my EPs using both training methods, I would recommend using the silent command (Smith method). Reasons why:
Gibbons/West Method is effective for some, Dave Walker proved that with his success running all age Brittany’s. However, I do believe it better serves your softer dogs. I also believe it confuses the dog, the same e collar command on the neck for recall is the same for whoa. My male EP ended up flagging his birds because I put too much collar pressure on him. E collar pressure on the neck did not phase no matter what level it was on. This method also keeps the dog on a check cord a long time through the breaking process. I do not recommend for a beginner, to many areas to screw up.
The silent command has been much easier and I’ve had better success with. I believe the whoa post and e collar on the belly is a must in my program. I also think the dog ends up more polished especially when W and S broke for trials. My dogs have better style and intensity using this system. I do deviate here and there to make it my own using some George Hicock theory but the bones are silent command.
Long story short, use what is easiest for you to comprehend and stick with it. Don’t let people sway you one way or another especially when 2-4 weeks int the training. Good luck, be glad to help if I can!