Welcome to the GTA Keith! Always nice to have another friendly person around here.If you have to choose between those two, I think it's the M34 hands down. Both guns have the power for squirrels at that range. But the 350 just is not a beginner friendly gun at all. It takes a lot of practice and technique to shoot, and the learning curve can be pretty steep on a 350, especially a stock one. In addition, the 34 is easier to shoot and should be a bit quieter. It's also lighter. And on top of all that it's $100 less in your case, and that's $100 that can go toward a tune or some accessories.
Good luck in your decision and have fun!