Not the same. You have different wallet address for miners on different machine. Thanks for sharing your finding in advance. I have never tried solo mining before. That's why I want to know how to setup a private testnet to try the solo.
You can copy the same wallet.dat file to every different machine and all block find rewards will go to the same wallet, which you can check from your home PC. The wallet should be encrypted before copying anywhere, but it you not encrypted it and have some funds in it, be careful because by encrypting it you will lose funds. I did solo mining earlier and that setup was working 100%. You don't need testnet, just try it on main.