Yes. To do this, you need to make sure that your second configuration file uses a different name than your original OpenVPN client file. For example, running sudo cp ./maketecheasier-new.ovpn /etc/openvpn/client-2.conf will ensure that your new file will not overwrite the original one.
Next, you also need to disable the original client unit file: sudo systemctl disable --now openvpn@client.service and enable the new one: sudo systemctl enable --now openvpn@client-2.service.